This study developed the first palaeoenvironmental evolutionary model for the coastal plain of the region of Vitoria (ES, Brazil). Most previous research in Brazil has focused on large estuarine and deltaic plain systems, whereas Vitoria is characterized by a narrow fluvial-marine plain within an embayed rocky coast, with limited sediment input. Fluvial, embayment, estuarine and beach palaeoenvironments have been interpreted in a previous study from 4 boreholes (each 20 m long) retrieved across the coastal plain. The chronological evolution of these palaeoenvironments is reconstructed based on taxonomic molluscan classification and dating (radiocarbon and OSL). The results show that all mollusk shells are marine, which corroborates the sedimentological interpretations. A wide estuarine bay with a free connection to the sea is inferred to have formed during the last interglacial maximum (MIS 5e). The low-energy environment inhibited formation of sandy Pleistocene barriers in the inner part of the plain. Results from this research evidence a MIS 3 transgression in the study area suggesting a sea level higher than generally shown in established sea-level curves. A shallow embayment with sub-environments is formed around ¹⁴C 50-38 ka BP. These sub-environments vary along the embayment, as shown by distinct facies and mollusk shells. The Pleistocene radiocarbon ages match with the OSL fluvial sand age (36 OSL ka) in the upper part of the plain, representing the subsequent regression, where there is no marine influence. During the Holocene transgression (8900 and 7100 cal BP) an estuarine bay connected to the sea was again formed. Around 7800 cal BP, a transgressive sandy barrier was formed at the entrance of the embayment and was subsequently drowned (7500 cal BP) due to sea-level rise. During the Holocene regression (last 5000 years), inner areas were filled and transformed into wetlands. Seaward, a regressive sand barrier developed, dated between 3200 and 3000 cal BP. The Pleistocene evolution presented for the Vitoria region partially agrees with the existing models for the Brazilian coast. The main difference is the limited contribution of quartz sands transported from nearshore under low-energy hydrodynamic conditions during the filling of the embayment.

这项研究为维多利亚地区（巴西，巴西）的沿海平原开发了第一个古环境演化模型。巴西以前的大多数研究都集中在大型河口和三角洲平原系统上，而维多利亚州的特征是在一个内陆多岩石的海岸内有一个狭窄的河海平原，沉积物输入有限。在先前的研究中，从沿沿海平原取回的4个钻孔（每个长20 m）中解释了河流，河床，河口和海滩的古环境。这些古环境的时间顺序演化是基于分类学软体动物分类和年代（放射性碳和OSL）来重建的。结果表明，所有软体动物壳都是海洋生物，这证实了沉积学解释。可以推断，在最后一次冰间期最大值（MIS 5e）期间，形成了一个宽阔的河口海湾，与海洋自由相连。低能环境抑制了平原内部沙质更新世屏障的形成。这项研究的结果表明，研究区域发生了MIS 3侵害，表明海平面高于已建立的海平面曲线中普遍显示的海平面。在周围形成带有子环境的浅层掩体¹⁴C 50-38 ka BP。这些不同的环境沿着巢状变化，如不同的相和软体动物壳所示。更新世的放射性碳年龄与平原上部的OSL河流砂年龄（36 OSL ka）相匹配，这表示随后的回归，没有海洋影响。在全新世海侵（8900和7100 cal BP）期间，再次形成了与海洋相连的河口湾。在大约7800 cal BP附近，海堤入口处形成了一个海侵性沙质屏障，随后由于海平面上升而被淹没（7500 cal BP）。在全新世回归期间（过去5000年），内部区域被填充并转变为湿地。Seaward是一种渐进式防砂屏障，其开发日期为3200至3000 cal BP。向维多利亚地区展示的更新世演化部分与巴西海岸的现有模型相吻合。主要区别是在填埋场期间，在低能水动力条件下从近岸运来的石英砂的贡献有限。