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Middle Eocene carbonate platforms of the westernmost Tethys Sediment. Geol. (IF 2.728) Pub Date : 2021-01-17 Manuel Martín-Martín; Francesco Guerrera; Josep Tosquella; Mario Tramontana
A study of the paleoenvironmental evolution of the middle Eocene platforms recognized in the westernmost Tethys has been carried out in the well exposed middle Eocene succession from Sierra Espuña-Mula basin (Betic Cordillera, S Spain). Eight microfacies (Mf1 to Mf8) have been recognized, based mainly on fossil assemblages (principally larger benthic foraminifera), and rock texture and fabric. The
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Provenance, palaeoclimate and palaeoenvironments of a non-marine Lower Cretaceous facies: Petrographic evidence from the Wealden Succession Sediment. Geol. (IF 2.728) Pub Date : 2021-01-15 Oladapo O. Akinlotan; Ekundayo J. Adepehin; GarethH. Rogers; Elisha C. Drumm
Petrographic datasets from sedimentary rocks are very useful for reconstructing their palaeoenvironmental settings especially when field and fossil datasets are unobtainable or inadequate. This study presents the first detailed and comprehensive petrographic study of the four formations constituting the non–marine Lower Cretaceous of the Weald Sub-basin of south-east England and employed petrographic
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Paleogeographic evolution of the southern Paraná Basin during the Late Permian and its relation to the Gondwanides Sediment. Geol. (IF 2.728) Pub Date : 2021-01-14 Henrique Parisi Kern; Ernesto Luiz Correa Lavina; Paulo Sérgio Gomes Paim; Tiago Jonatan Girelli; Cristiano Lana
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Extra-large grains in Late Glacial – Early Holocene aeolian inland dune deposits of cold climate, European Sand Belt, Poland: An evidence of hurricane-speed frontal winds Sediment. Geol. (IF 2.728) Pub Date : 2021-01-14 Piotr Łapcik; Krzysztof Ninard; Alfred Uchman
Only exceptionally, grains larger than 2–3 mm are involved in dune-forming processes. In 16 Late Glacial – Early Holocene inland dunes deposits from three regions of the northern and central Poland, beds, layers, laminae and lenses containing extra-large grains, up to 20.5x12.5x11 mm in the longest axes, are present. Occurrences of the extra-large grains are documented in the dunes dispersed in three
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The uppermost Pleistocene–Holocene mud drape across the Marmara Sea: quantification of detrital supply from southern Marmara rivers Sediment. Geol. (IF 2.728) Pub Date : 2021-01-13 R.N. Hiscott; A.E. Aksu; C. Yaltırak
The Marmara Sea (area 11,350 km2; volume 3,378 km3; central basins >1100 m deep) straddles the North Anatolian Transform Fault separating the Eurasian and Aegean-Anatolian tectonic plates. Along with the shallow straits of Dardanelles and Bosphorus (depths ~63 m and ~40 m, respectively), the Marmara Sea forms the only marine connection between the Black Sea and the eastern Mediterranean. During Pleistocene
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Upper Cretaceous to Palaeogene successions of the Gouaro anticline: deepwater sedimentary records of the tectonic events that led to obduction in New Caledonia (SW Pacific) Sediment. Geol. (IF 2.728) Pub Date : 2021-01-08 Aurélien Bordenave; Samuel Etienne; Julien Collot; Philippe Razin; Martin Patriat; Carine Grelaud; Claudia Agnini; Hugh Morgans; Flora Guillemaut; Armand Moreau
In New Caledonia, upper Cretaceous to Palaeogene sedimentary rocks record a regional tectonic shift from Cretaceous extension to Eocene compression, which led to the obduction of oceanic mantle onto the northeastern tip of the submerged Zealandia continent. This study provides new descriptions of these successions in the region of the Gouaro anticline, from outcrops and an extensively cored, 1.9 km
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The influence of silica on carbonate DIAGENESIS in chalk – EKOFISK formation, DANISH central GRABEN Sediment. Geol. (IF 2.728) Pub Date : 2021-01-08 Kasper H. Blinkenberg; Kresten Anderskouv; Theis I. Sølling; Khalid Al-Ramadan; Lars Stemmerik
Upper Cretaceous–Danian chalk forms a range of complex diagenetic fabrics despite its commonly white and monotonous appearance in outcrop and core. This reflects the interaction between processes linked to composition, depositional facies, texture, sedimentation rates, bioturbation, mineralogy, burial and hydrocarbon charging history. Such fabrics have a substantial impact on reservoir quality, either
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Permian mixed carbonate–siliciclastic lagoon coastal system in West-Central Gondwana Sediment. Geol. (IF 2.728) Pub Date : 2021-01-06 Rafael Oliveira Silva; Mariangela Garcia Praça Leite; Isaac Rudnitzki; Wagner Souza-Lima
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Sedimentology and stratigraphy of syn-subduction Miocene fine-grained turbidites deposited in first stages of trench-slope basin development: Whakataki Formation, North Island, New Zealand Sediment. Geol. (IF 2.728) Pub Date : 2021-01-06 Craig R. Sloss; Stephanie Tillquist; Sarah McGill; Tiah Penny; Craig Ballington; Luke Nothdurft; Jessica Trofimovs; Mark J. Lawrence; Christoph E. Schrank
This study provides a detailed sedimentological, stratigraphic and depositional model for the lower Whakataki Formation. The fine-grained nature of the turbidite successions and common Tbcde successions suggests deposition associated with medial to distal submarine fan deposits. However, the textural and compositional immaturity, combined with a high carbonaceous and carbonate content of the clastic
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Travertine deposition and diagenesis in Ca-deficiency perched hot spring systems: A case from Shihuadong, Tengchong, China Sediment. Geol. (IF 2.728) Pub Date : 2021-01-05 Lianchao Luo; Huaguo Wen; Enrico Capezzuoli
Travertines are generally considered as carbonate deposits related to Ca-rich hot springs. Ca-deficiency hot springs, however, can also produce travertines under suitable conditions and little is known about the travertine deposition and diagenesis in these systems. Therefore, we studied a fossil perched Ca-deficiency spring system at Shihuadong, China to discuss its genesis and diagenesis. This system
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A fine detail physico-chemical depositional model for Devonian organic-rich mudstones: A petrographic study of the Hare Indian and Canol Formations, Central Mackenzie Valley, Northwest Territories Sediment. Geol. (IF 2.728) Pub Date : 2021-01-05 Sara K. Biddle; Maya T. LaGrange; Brette S. Harris; Kathryn Fiess; Viktor Terlaky; Murray K. Gingras
The Hare Indian and Canol Formations, which are part of the Horn River Group in the Northwest Territories, Canada, primarily consist of organic-rich mudstones deposited during the Middle to Late Devonian. The formations were previously considered to represent marine basin fill accumulated in an oxygen-starved distal shelf setting, evidenced by the organic-rich character, pyrite content, and lack of
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Formation and evolution of efflorescent halite speleothems beneath tepee structures in the Red Sea coastal evaporation settings, Jeddah, Saudi Arabia Sediment. Geol. (IF 2.728) Pub Date : 2020-12-30 Mahmoud A. Aref; Ammar A. Mannaa
This study documents the occurrence of efflorescent halite speleothems of stalactites, columns, flowstones, stalagmites and popcorns beneath tepee structures in the Red Sea coastal sabkhas, desiccated halite pond and dykes of saltworks, Jeddah, Saudi Arabia. The study aims to interpret the formation and evolution of efflorescent halite speleothems due to the high relative humidity of the area. Field
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Provenance, tectonic setting and source area-paleoweathering of sandstones of the Bahariya Formation in the Bahariya Oasis, Egypt: An implication to paleoclimate and paleogeography of the southern Neo-Tethys region during Early Cenomanian Sediment. Geol. (IF 2.728) Pub Date : 2020-12-11 Hamdalla A. Wanas; Ehab M. Assal
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Micropetrographic characterization of a siliciclastic-rich chalk; Upper Cretaceous Austin Chalk Group along the onshore northern Gulf of Mexico, USA Sediment. Geol. (IF 2.728) Pub Date : 2020-12-11 Robert G. Loucks; Robert M. Reed; Lucy T. Ko; Christopher K. Zahm; Toti E. Larson
The Austin Chalk Group is a very fine grained carbonate mudrock composed predominantly of microorganisms. To geologically characterize such a unit, the components and depositional and diagenetic features must be examined at the nano- to microscale, using micropetrography. Analytical methods include scanning electron microscopy, energy-dispersive X-ray spectroscopy, and thin-section analysis. Through
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Platform-top reef sand apron morphodynamics and the half-empty bucket Sediment. Geol. (IF 2.728) Pub Date : 2020-12-17 Eugene C. Rankey
In shallow water atop many isolated platforms and atolls, reef sand aprons largely consist of debris shed platformward from shelf-margin reefs towards the lagoon. Although their general geomorphology and sedimentology are broadly understood, quantitative details of the possible role of reef sand apron hydrodynamics on their geomorphic evolution remain less well constrained. To test the hypothesis that
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Siliceous sinters in thermal spring systems: review of their mineralogy, diagenesis, and fabrics Sediment. Geol. (IF 2.728) Pub Date : 2020-12-19 Brian Jones
This paper provides a comprehensive review of the sinter deposits, formed largely of opal-A, that are form around hot springs and geysers throughout the world. The discharge aprons around hot springs and geysers are commonly characterized by spectacular discharge aprons that are covered with variegated microbial mats and ornate arrays of siliceous sinters that commonly contain well-preserved microbes
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Depositional and environmental controlling factors on the genesis of Quaternary tufa deposits from Bonito region, Central-West Brazil Sediment. Geol. (IF 2.728) Pub Date : 2020-12-17 Jéssica Thaís Ferreira Oste; Álvaro Rodríguez-Berriguete; Patrick Führ Dal’ Bó
The Pleistocene and Holocene tufas of the Serra da Bodoquena (Bonito region, Brazilian Midwest) consist of several deposits related to a karstic system developed in the carbonatic rocks of Corumbá Group. Tufas currently forming in the Serra da Bodoquena area (Mimoso and Formoso rivers) were investigated for a better understanding of which environmental changes control the deposition of different types
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Provenance of passive-margin and syn-collisional units: Implications for the geodynamic evolution of the Southern Brasília Orogen, West Gondwana Sediment. Geol. (IF 2.728) Pub Date : 2020-12-17 Rodrigo S. Marimon; Rudolph A.J. Trouw; Elton L. Dantas; André Ribeiro; Priscila Santos; Klaus Kuster; Rodrigo Vinagre
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A 1600 year-long sedimentary record of tsunamis and hurricanes in the Lesser Antilles (Scrub Island, Anguilla) Sediment. Geol. (IF 2.728) Pub Date : 2020-11-24 M. Biguenet; P. Sabatier; E. Chaumillon; C. Chagué; F. Arnaud; F. Jorissen; T. Coulombier; E. Geba; L. Cordrie; P. Vacher; A.L. Develle; E. Chalmin; F. Soufi; N. Feuillet
The Lesser Antilles are a densely populated region where local populations and industrial facilities are concentrated at the coastlines, and are therefore exposed to many rapid-onset hazards such as hurricanes and tsunamis. However, the historical catalog of these events is too short to allow risk assessment and return period estimations, and it needs to be completed with long-term records of washover
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Morphology, accumulation and preservation of draa systems in a Precambrian erg (Galho do Miguel Formation, SE Brazil) Sediment. Geol. (IF 2.728) Pub Date : 2020-11-28 Áquila Ferreira Mesquita; Giorgio Basilici; Marcus Vinícius Theodoro Soares; Richard Guillermo Vásconez Garcia
Proterozoic aeolian successions tend to exhibit a low complexity in the architectural organisation, generally related to simple dunes with low morphological diversity. Although most palaeoenvironmental reconstructions of ancient ergs confirm this scenario, the general conditions in the Precambrian landmass should have allowed the construction of larger and more complex sedimentary aeolian systems than
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The sedimentary architecture of hyperpycnites produced by transient turbulent flows in a shallow lacustrine environment Sediment. Geol. (IF 2.728) Pub Date : 2020-11-16 Luxing Dou; Jim Best; Zhidong Bao; Jiagen Hou; Li Zhang; Yuming Liu
Hyperpycnal flows are river-derived extrabasinal turbidity currents transporting both sand and clay to lacustrine, coastal, shelf and deepwater sedimentary environments. Experimental research in the past twenty years has shown that the presence of clay in sediment-laden flows promotes a transitional behavior between fully turbulent flow and a quasi-laminar plug flow regime. However, to date, most work
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Short-lived early Cenomanian volcanic atolls of Mt. Carmel, northern Israel Sediment. Geol. (IF 2.728) Pub Date : 2020-11-17 Or M. Bialik; Elias Samankassou; Aaron Meilijson; Nicolas D. Waldmann; Josh Steinberg; Kul Karcz; Yizhaq Makovsky
Volcanic atolls host exceptionally important marine ecosystems in the modern oceans. Yet, due to limited exposures, fossil atolls are poorly constrained. Multiple drowned Cretaceous volcanic atolls have been reported in the Pacific, but less information exists regarding those in the Tethys. Here we report on two early Cenomanian age volcanic atolls outcropping in Mt. Carmel (northern Israel), along
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Precipitation of kerolite and sepiolite associated with Mg-rich carbonates in a cave environment Sediment. Geol. (IF 2.728) Pub Date : 2020-11-12 Andrea Martín-Pérez; Ángel La Iglesia; Gonzalo Almendros; José Antonio González-Pérez; Ana María Alonso-Zarza
In Castañar Cave (Cáceres, Spain), Mg-Si phases forming fibres and films occur associated with aragonite, magnesite, huntite and spheroidal dolomite in moonmilk, coatings and crust speleothems. A detailed study of bulk and carbonate-removed samples allowed us to identify the Mg-Si phases as kerolite (Mg3Si4O10(OH)2·nH2O) and sepiolite Mg4Si6O15(OH)2·6(H2O) of variable “crystallinity” and very pure
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New constraints on the palaeo-environmental conditions of the Eastern Paratethys: Implications from the Miocene Diatom Suite (Azerbaijan) Sediment. Geol. (IF 2.728) Pub Date : 2020-11-12 Elshan Abdullayev; Andre Baldermann; Laurence N. Warr; Georg Grathoff; Yelena Taghiyeva
The Miocene Diatom Suite sediments of the Eastern Paratethys Sea, Azerbaijan, provide significant information to establish how Middle Miocene climate influenced erosion, sedimentation and deposition in the marine environments and continental source areas of Western Asia. Discriminant function analyses, ratios of Ti/Al, Si/Ca and Sr/Ca as well as mineralogical composition data indicate the Karaganian-Konkian
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Reconstruction of the Silurian to Devonian stratigraphic succession along the northeastern margin of the Junggar block, Xinjiang, NW China, and its tectono-paleogeographic implications for the southwestern Central Asian Orogenic Belt Sediment. Geol. (IF 2.728) Pub Date : 2020-11-09 Meng Zhang; Guocan Wang; Xionghua Zhang; Qun’an Liao; Wei Wang; Ruilu Guo; Pan Zhang
The Paleozoic sediments on micro-blocks in the southwestern Central Asian Orogenic Belt record the tectonic evolution of the Paleo-Asian Ocean and accretionary processes of the south Siberian Craton. However, the absence of detailed stratigraphic studies and sedimentary basin analyses has led to disputes on Paleozoic arc-basin relationships and the tectonic evolution of the Junggar block and East Junggar
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Characteristics and distribution of the event deposits induced by the 2011 Tohoku-oki earthquake and tsunami offshore of Sanriku and Sendai, Japan Sediment. Geol. (IF 2.728) Pub Date : 2020-11-11 Ken Ikehara; Kazuko Usami; Tomohisa Irino; Akiko Omura; Robert G. Jenkins; Juichiro Ashi
Deep-sea turbidite deposits are useful tools for submarine paleoseismology. It is fundamental to understand what kind of disturbance occurred owing to the earthquake and which event-induced deposits were formed in a particular area. The 2011 Tohoku-oki earthquake and tsunami were the most destructive geohazards in Japanese history. To understand their influence in the seafloor environment and to characterize
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Automatic identification of fossils and abiotic grains during carbonate microfacies analysis using deep convolutional neural networks Sediment. Geol. (IF 2.728) Pub Date : 2020-11-03 Xiaokang Liu; Haijun Song
Petrographic analysis based on microfacies identification in thin sections is widely used in sedimentary environment interpretation and paleoecological reconstruction. Fossil recognition from microfacies is an essential procedure for petrographers to complete this task. Distinguishing the morphological and microstructural diversity of skeletal fragments requires extensive prior knowledge of fossil
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Preservation of organic carbon in dolomitized Cambrian stromatolites and implications for microbial biosignatures in diagenetically replaced carbonate rock Sediment. Geol. (IF 2.728) Pub Date : 2020-10-14 Ashley E. Murphy; Scott T. Wieman; Juliane Gross; Jennifer C. Stern; Andrew Steele; Mihaela Glamoclija
Stromatolites have been a major focus in the search for ancient microbial life, however, the organic carbon biosignatures of dolomitized stromatolites have not yet been fully characterized or correlated with their dolomitizing conditions. Although dolomitization rarely preserves microbial morphology, the presence of organic carbon can provide valuable information for characterization of fossils' biogenicity
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Probabilistic neural network based seabed sediment recognition method for side-scan sonar imagery Sediment. Geol. (IF 2.728) Pub Date : 2020-11-11 Caiyun Sun; Yi Hu; Peng Shi
Recognition of seabed sediment is one of the critical foundations of marine exploitation. This paper proposes a probabilistic neural network (PNN) based method to improve the identification accuracy of seabed sediment from side-scan sonar imagery. The feature set of side-scan images consists of two types of features, namely textural features and color features. In this study, partial eigenvalues of
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Reviewing sedimentological and hydrodynamic data of large shallow coastal lagoons for defining mud depocenters as environmental monitoring sites Sediment. Geol. (IF 2.728) Pub Date : 2020-10-26 E.C. Bortolin; J. Weschenfelder; E.H. Fernandes; L.P. Bitencourt; O.O. Möller; F. García-Rodríguez; E. Toldo
We reviewed historical data on surface sediment composition/distribution and hydrodynamics of the Patos-Mirim lagoonal system, the largest coastal shallow limnological system of the world, located in eastern South America, which is ca.15,000 km2, the maximum length is almost 500 km and maximum depth is around 7 m. We inferred the geographical position of six mud depocenters in relation to the hydrodynamic
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Landscape and depositional controls on palaeosols of a distributive fluvial system (Upper Cretaceous, Brazil) Sediment. Geol. (IF 2.728) Pub Date : 2020-09-18 Marcus Vinícius Theodoro Soares; Giorgio Basilici; Paolo Lorenzoni; Luca Colombera; Nigel Philip Mountney; Agustín Guillermo Martinelli; Áquila Ferreira Mesquita; Thiago da Silva Marinho; Richard Guillermo Vásconez García; André Marconato
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A 6000-year record of environmental change from Grand Cayman, British West Indies Sediment. Geol. (IF 2.728) Pub Date : 2020-10-24 Simone Booker; Brian Jones
Three sediment cores from North Sound lagoon provide a continuous record of environmental changes (atmospheric moisture and temperature) that have affected Grand Cayman, British West Indies, over the last ~6000 years. Changes in the facies and carbonate components indicate a transition from fresh-brackish-water coastal ponds to a fully marine environment, which coincided with global sea level rise
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Sedimentary architecture and provenance analysis of a sublacustrine fan system in a half-graben rift depression of the South China Sea Sediment. Geol. (IF 2.728) Pub Date : 2020-10-21 Entao Liu; Hua Wang; Yuexing Feng; Songqi Pan; Zhenhua Jing; Qinglin Ma; Huajun Gan; Jian-xin Zhao
Research on the sedimentary architecture and provenance of sublacustrine fans is crucial not only to better understand the gravity flow evolution in lacustrine basins but to successfully locate hydrocarbon reservoirs. This study targets at a sublacustrine fan with a large petroleum reserve that has been revealed by drilling within an Eocene lacustrine succession in the Fushan Depression, northern South
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Paleolake salinity evolution in the Qaidam Basin (NE Tibetan Plateau) between ~42 and 29 Ma: Links to global cooling and Paratethys sea incursions Sediment. Geol. (IF 2.728) Pub Date : 2020-10-19 Chengcheng Ye; Yibo Yang; Xiaomin Fang; Weilin Zhang; Chunhui Song; Rongsheng Yang
Climate change in the Asian interior during the early Cenozoic remains poorly constrained due to difficulties in distinguishing the impacts of global cooling, the early uplift of the Tibetan Plateau and the retreat of the Paratethys. A quantitative estimation of paleolake salinity enables a better understanding of the regional hydrological cycle and contemporaneous climate change. Here, we present
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Ichnofabrics and their roles in the modification of petrophysical properties: A case study of the Ordovician Majiagou Formation, northwest Henan Province, China Sediment. Geol. (IF 2.728) Pub Date : 2020-09-18 Yongbin Niu; Jim D. Marshall; Huibo Song; Bin Hu; Yazhou Hu; Yi Jin; Li-Jun Zhang; Jienan Pan; Wei Wu
The carbonate rocks of the Ordovician Majiagou Formation from the northwestern part of Henan Province and their diverse trace fossils provide an outcrop analogue for bioturbated, low porosity and low permeability carbonate reservoirs. Three ichnofabrics can be defined based on the ichnotaxonomy, ichnodiversities, individual abundances and overall bioturbation indices. The Balanoglossites ichnofabric
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XRF and hyperspectral analyses as an automatic way to detect flood events in sediment cores Sediment. Geol. (IF 2.728) Pub Date : 2020-09-25 William Rapuc; Kévin Jacq; Anne-Lise Develle; Pierre Sabatier; Bernard Fanget; Yves Perrette; Didier Coquin; Maxime Debret; Bruno Wilhelm; Fabien Arnaud
Long-term changes in flood activity have often been reconstructed to understand their relationships to climate changes. This requires identification of flood layers according to certain characteristics (e.g., texture, geochemical composition, grain-size) and then to count them using naked-eye observation. This method is, however, time-consuming, and intrinsically characterized by a low resolution that
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Evolution pattern of Early Permian carbonate buildups: With reference to the carbonate mounds in eastern Inner Mongolia, North China Sediment. Geol. (IF 2.728) Pub Date : 2020-09-24 Zhen Yan; Jianbo Liu; Xiaochi Jin; Yukun Shi; Kunxuan Tian; Haifeng Wang
The Sakmarian–Kungurian (Early Permian) carbonate mounds of the Amushan Formation of the Deyanqimiao section in eastern Inner Mongolia, North China comprise phylloid algae-echinoderm mound, fusulinid-echinoderm mound and echinoderm mound. They were constructed by repeating the following steps in the mid-ramp and outer ramp environments: 1) skeletal grains accumulated in situ, or after short-distance
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Paleoenvironmental significance of the monospecific biostromes in the Campanian-Maastrichtian Duwi Formation (Eastern Desert, Egypt) Sediment. Geol. (IF 2.728) Pub Date : 2020-09-11 Ahmed A. Abdelhady; Barbara Seuss; Franz T. Fürsich; Ahmed Ali; Khalaf H.M. Abdel-Raheem; Ramadan S.A. Mohamed
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Challenges to carbonate-evaporite peritidal facies models and cycles: Insights from Lower Cretaceous stromatolite-bearing deposits (Oncala Group, N Spain) Sediment. Geol. (IF 2.728) Pub Date : 2020-08-21 I. Emma Quijada; M. Isabel Benito; Pablo Suarez-Gonzalez; Marta Rodríguez-Martínez; Sonia Campos-Soto
Peritidal carbonate-evaporite successions, since they are developed in the transition between continental and marine realms, provide essential keys for palaeobathymetric and palaeoclimatic interpretations. As a result, several facies models have been proposed to assist on the interpretation of ancient tidal flat deposits, and peritidal successions have been extensively used for cyclicity analyses.
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Sediment deformation and production beneath soft-bedded Palaeozoic ice sheets Sediment. Geol. (IF 2.728) Pub Date : 2020-09-05 D.P. Le Heron; M. Heninger; C. Baal; M. Bestmann
The expansion of ice sheets over soft, sandy substrates was widespread in the Early Palaeozoic, during the Late Ordovician glaciation of North Africa and Arabia. Similarly, large parts of southern Africa were glaciated by soft bedded ice sheets in the Late Palaeozoic Ice Age. An unanswered question is the extent to which subglacial deformation involved the passive recycling of unconsolidated materials
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Manchuriophycus-like elliptical cracks in thin mudstones intercalated with lacustrine sandstone: Intrastratal crack formation in water-saturated sediments Sediment. Geol. (IF 2.728) Pub Date : 2020-09-09 D.-C. Lee; U.H. Byun; Y.K. Kwon; Y. Keehm; G.Y. Jeong; K. Yi
Manchuriophycus-like elliptical cracks are found in thin mudstone layers and lenses intercalated with wave-rippled lacustrine sandstone beds of the Lower Cretaceous Jinju Formation, South Korea. The cracks are interpreted as intrastratal shrinkage cracks formed by liquidization and injection of sand, hydroplastic deformation of mud, and concomitant dewatering of the sediments in water-saturated conditions
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The Devonian of the Paraná Basin, Brazil: Sequence stratigraphy, paleogeography, and SW Gondwana interregional correlations Sediment. Geol. (IF 2.728) Pub Date : 2020-09-09 Mateus Rodrigues de Vargas; Ariane Santos da Silveira; Andressa Bressane; Roberto Salvador Francisco D'Avila; José Eduardo Faccion; Paulo Sérgio Gomes Paim
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Sedimentary fills and sensitivity analysis of deep lacustrine facies in multi-segment rift basins: Insights from 3D forward modeling Sediment. Geol. (IF 2.728) Pub Date : 2020-08-27 Chengcheng Zhang, Christopher A. Scholz, Ashley D. Harris
This article presents a series of stratigraphic forward simulations of deep lacustrine sedimentary fills of continental multi-segment rift basins. These models integrate basin filling with the evolution of the extrabasinal catchment area, and relate tectonism and precipitation fluctuations to changes in lake level and sediment supply. The models reproduce the physical processes acting on the whole
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Major element and REE compositions of Pliocene sediments in southwest Japan: Implications for paleoweathering and paleoclimate Sediment. Geol. (IF 2.728) Pub Date : 2020-08-20 Nozomi Hatano, Kohki Yoshida, Saori Mori, Eiji Sasao
The history of the East Asian monsoon and the relationship between the development of the monsoon climate, tectonics and global climate are complicated and controversial. Earlier studies have indicated that the East Asian monsoon fluctuated in the Asian interior during the Pliocene. Thus, the chemical weathering record in coastal regions of East Asia can be the key to elucidating its evolution as well
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Flume experiments test grain-size distribution of onshore tsunami deposits Sediment. Geol. (IF 2.728) Pub Date : 2020-08-19 Tetsuya Shinozaki, Naofumi Yamaguchi, Tomohiro Sekiguchi
We conducted flume experiments to examine the effects of grain size on the distribution of tsunami deposits, using well-sorted quartz sand with median diameters (D50) of 0.064, 0.134, 0.215, and 0.250 mm. In these experiments, we investigated deposits transported onto a flat terrestrial area by a single tsunami-like bore without a strong backwash flow. The post-tsunami distributions of the coarser
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Sedimentary zonation shift of tidal flats in a meso-tidal estuary Sediment. Geol. (IF 2.728) Pub Date : 2020-08-17 Wen Wei, Zhijun Dai, Wenhong Pang, Jie Wang, Shu Gao
Understanding the spatial-temporal pattern of sedimentary dynamics on tidal flats is important for examining their ecological function and evolutionary trend. In this study, the dynamic state of sediments across an open-coast tidal flat of the meso-tidal Changjiang Estuary, China, on a monthly scale from December 2014 to June 2016 was examined, based on a high-spatial-resolution sedimentological-topographic
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A 7300 year record of environmental changes in a coastal wetland (Moawhitu), New Zealand, and evidence for catastrophic overwash (tsunami?) Sediment. Geol. (IF 2.728) Pub Date : 2020-08-13 Catherine Chagué, Jessica Cope, Cathy Kilroy, Geraldine Jacobsen, Atun Zawadzki, Henri Wong
Three sedimentary sequences from a coastal wetland behind a sand barrier, on the west coast of d'Urville Island, New Zealand, were examined using a multi-proxy approach, including sedimentological, geochemical and microfossil (diatom) analyses, with the chronology established using radiocarbon and 210Pb dating. Data show that a brackish lagoon started developing 7300 year ago after formation of the
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The embryonic Himalayan foreland basin revealed in the eastern Yarlung Zangbo suture zone, southeastern Tibet Sediment. Geol. (IF 2.728) Pub Date : 2020-08-13 Zhen Wei, Xianghui Li, Hugh Sinclair, Xiaolong Fan, Jingyu Wang, Chaokai Zhang, Gongjue Jiebu
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The role of hydrodynamic impact force in subaerial boulder transport by tsunami—Experimental evidence and revision of boulder transport equation Sediment. Geol. (IF 2.728) Pub Date : 2020-08-13 Hira A. Lodhi, Haider Hasan, N.A.K. Nandasena
The hydrodynamic impact contributes to the initiation of subaerial boulder transport by tsunamis and tsunami-like flows. Here, we consider two approaches to modelling this impact force—hydrostatic and hydrodynamic—and assess the suitability of each in boulder transport models. The model proposed, solved as an ordinary differential equation, eliminates the need to assume a conservative value of flow
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Provenance of northwestern Patagonian river sediments (44–48°S): A critical evaluation of mineralogical, geochemical and isotopic tracers Sediment. Geol. (IF 2.728) Pub Date : 2020-08-13 Dawei Liu, Sebastien Bertrand, Tania Villaseñor, Toon Van Dijck, Nathalie Fagel, Nadine Mattielli
The ability to trace and quantify sediment provenance in northwestern Patagonia is increasingly needed to properly understand modern sediment erosion and transport processes in this rapidly changing environment, and to accurately interpret sediment records from adjacent basins in terms of climate and environmental change. Nonetheless, no study so far has systematically evaluated the effectiveness of
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Lacustrine microbialite pinnacles in the Palaeogene of Patagonia, Argentina: Facies and controls Sediment. Geol. (IF 2.728) Pub Date : 2020-08-10 Ana María Alonso-Zarza, Nora G. Cabaleri, Pedro Huerta, Claudia Armella, Álvaro Rodríguez-Berriguete, Mateo D. Monferran, Oscar F. Gallego, María Cecilia Ubaldon, Diego Silva Nieto
Large carbonate microbialite build-ups are relatively uncommon in ancient fresh-water lacustrine basins as compared with those marine and saline environments. This paper discusses the formation of a large continental lacustrine deposit, the Oligocene-Miocene Carinao Formation in Argentina, which contains large bioherms. The lacustrine formation occurs in N-S corridor and is mostly composed by meter
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Reduction effect of tsunami sediment transport by a coastal forest: Numerical simulation of the 2011 Tohoku tsunami on the Sendai Plain, Japan Sediment. Geol. (IF 2.728) Pub Date : 2020-08-08 Satoshi Kusumoto, Kentaro Imai, Aditya Riadi Gusman, Kenji Satake
We examined the effect of the coastal forest on tsunami sediment movement on the Sendai Plain, Japan, during the 2011 Tohoku tsunami using a numerical simulation of sediment transport. To account for the variable roughness coefficient in the coastal forest, a composite equivalent roughness coefficient was adopted. The simulated mean concentration of suspended sediment, wave height, flow velocity, and
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Sedimentary characteristics and interactions among volcanic, terrigenous and marine processes in the Late Permian Kuishan Member, Eastern Block of the North China Craton Sediment. Geol. (IF 2.728) Pub Date : 2020-08-07 Wenwen Wang, Zaixing Jiang, Xiangyang Xie, Jingxiang Guo, Yepeng Yang
Understanding the variability of depositional environment and depositional processes of the Late Permian Kuishan Member, North China Craton, is crucial for unraveling the evolution of sedimentary basin and epicontinental sea in Shandong tectonic domain. The Kuishan Member in the Eastern Block of the North China Craton, formed in association with general regression of an epicontinental sea, is composed
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The Late Pleistocene-Holocene sedimentary evolution of the Sines Contourite Drift (SW Portuguese Margin): A multiproxy approach Sediment. Geol. (IF 2.728) Pub Date : 2020-08-05 Manuel Teixeira, Pedro Terrinha, Cristina Roque, Antje H.L. Voelker, Pedro Silva, Emília Salgueiro, Fátima Abrantes, Filipa Naughton, Anxo Mena, Gemma Ercilla, David Casas
The Sines Contourite Drift (SCD), located in the Alentejo margin, southwest Iberian continental margin, has been through many depositional phases in result of climatic variations and bottom current oscillations, which determined a variable depositional pattern and an irregular sedimentary evolution since the Late Pleistocene. The SCD, being in the main path of the Mediterranean Outflow Water (MOW)
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Sublacustrine gravity-induced deposits: The diversity of external geometries and origins Sediment. Geol. (IF 2.728) Pub Date : 2020-08-05 Shuxin Pan, Huaqing Liu, Duonian Xu, Pingsheng Wei, Yongqiang Qu, Xin Guan, Caiyan Liu, Shuncun Zhang
Our current knowledge of deep-water depositional systems is mainly built of extensive achievements obtained from marine basins. Although lacustrine basins are important oil & gas productive areas of the world, gravity-induced deposits in these basins are poorly understood in the literature when compared with those documented in marine basins. Based on new insights from 3D seismic data, this paper attempts
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Miocene heterozoan carbonate systems from the western Atlantic equatorial margin in South America: The Pirabas formation Sediment. Geol. (IF 2.728) Pub Date : 2020-08-05 Orangel Aguilera, Karen Bencomo, Olga M. Oliveira de Araújo, Bruna Borba Dias, Giovanni Coletti, Daniel Lima, Silane A.F. da Silva-Caminha, Marcia Polck, Maria Virgínia Alves Martins, Carlos Jaramillo, Vinicius Tavares Kutter, Ricardo Tadeu Lopes
Outcrops of Neogene carbonates of the North Brazilian platform occur exclusively along the equatorial coast and represent some of the few existing examples of Neogene carbonate systems of the Atlantic coast of South America. The Pirabas Formation (early-middle Miocene) is the northernmost part of this platform. Although onshore mainly consists of small and scattered outcrops, it considerably extends
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Orbital cycles, differential subsidence and internal factors controlling the high-frequency sequence architecture in a Sinemurian shallow carbonate platform (Mallorca island, Spain) Sediment. Geol. (IF 2.728) Pub Date : 2020-07-30 Ana Sevillano, Beatriz Bádenas, Idoia Rosales, Antonio Barnolas, José María López-García
The ~125 m thick lower to lowermost upper Sinemurian peritidal to shallow subtidal platform carbonates in the Llevant Mountains of Mallorca (Spain) have been analysed from four stratigraphic sections, to provide new data on the hierarchical stacking pattern of high-frequency depositional sequences. Due to the fact that in shallow water environments the stacking of carbonate facies can be controlled
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Mixed siliciclastic-carbonate-evaporite sedimentation in an arid eolian landscape: The Khor Al Adaid tide-dominated coastal embayment, Qatar Sediment. Geol. (IF 2.728) Pub Date : 2020-07-28 John M. Rivers, Robert W. Dalrymple, Ruqaiya Yousif, Ismail Al-Shaikh, Josh D. Butler, Christopher Warren, Sabrina L. Skeat, Ekhlas M.M. Abdel Bari
The Khor Al Adaid embayment of southern Qatar represents a unique shallow-water mixed siliciclastic‑carbonate coastal depositional system that developed in a hyper-arid climatic setting over the past 6000 years. The embayment, which was formed during the Flandrian transgression as a result of flooding across a partially fault-controlled incised fluvial drainage, is supplied by quartz-rich sands delivered
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Increasing terrigenous sediment supply from Taiwan to the southern Okinawa Trough over the last 3000 years evidenced by SrNd isotopes and geochemistry Sediment. Geol. (IF 2.728) Pub Date : 2020-07-25 Siyi Hu, Zhigang Zeng, Xue Fang, Xuebo Yin, Zuxing Chen, Xiaohui Li, Bowen Zhu, Haiyan Qi
High-resolution sedimentary records reveal the patterns of weathering and erosion in response to climate change, environmental variability, and human activity. Here, we present major and trace element data, SrNd isotopic compositions, and mass accumulation rates (MARs) for the siliciclastic sediment fraction of a relatively high-resolution sedimentary archive from the southern Okinawa Trough, East
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LA-ICP-MS U-Pb geochronology and clumped isotope constraints on the formation and evolution of an ancient dolomite reservoir: The Middle Permian of northwest Sichuan Basin (SW China) Sediment. Geol. (IF 2.728) Pub Date : 2020-07-25 Liyin Pan, Anjiang Shen, Jian-xin Zhao, Anping Hu, Yi Hao, Feng Liang, Yuexing Feng, Xiaofang Wang, Lei Jiang
Recent advances in laser-ablation inductively coupled-plasma mass spectrometry (LA-ICP-MS) in-situ U-Pb radiometric dating and clumped isotope thermometry (Δ47) of carbonate minerals provide potential for refining the fluid flow and diagenetic history of carbonate successions. In this study, the Middle Permian dolomites proximal to the Longmenshan fold and thrust belt in northwest Sichuan Basin, southwest
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