This paper describes the ichnology and sedimentology of the middle Berriasian sedimentary succession of the Sidi Khalif Formation outcropping in Jebel Meloussi, Central Tunisia. The succession records deltaic progradation above outer shelf deposits and shows the vertical stacking of thickening and coarsening-upward parasequences dominated by hummocky cross-stratification, parallel lamination and abundant gutter casts. The mudstones and the thinly bedded fine-grained sandstones of the prodelta are characterized by scarce and low diverse horizontal trace fossils of the impoverished distal Cruziana ichnofacies, including cf. Thalassinoides, Phycosiphon, Planolites, Helminthoidichnites and cf. Helminthoidichnites. In contrast, trace fossils of the wave-dominated delta-front are dominated by deposit-feeding ichnotaxa, such as Rhizocorallium commune, Arenicolites isp., R. ?jenense, Thalassinoides and Planolites, which represent the proximal Cruziana ichnofacies. The lack of bioturbation structures in the amalgamated hummocky cross-stratification beds of the delta front is mostly related to the high frequency and/or high intensity episodic erosional amalgamation and deposition associated with storms. The difference between Rhizocorallium ichnospecies help to depict the erosional discontinuities bounding parasequences. The transgressive surfaces (TS) are characterized by R. ?jenense and by R. commune.

本文介绍了突尼斯中部杰贝勒梅卢西出露的 Sidi Khalif 组露头的中 Berriasian 沉积序列的年代学和沉积学。该层序记录了外陆架沉积物上方的三角洲进积，并显示了以丘状交叉分层、平行层理和丰富的排水沟铸件为主的增厚和粗化向上的平行层序的垂直叠置。前三角洲的泥岩和薄层细粒砂岩的特点是贫乏的远端克鲁齐亚纳岩相的水平痕迹化石稀少且多样性低，包括 cf. Thalassinoides，Phy​​cosiphon，Planolites，Helminthoidichnites和cf。蠕虫。相比之下，波主导的三角洲前缘的微量化石以沉积物为食的 ichnotaxa 为主，例如Rhizocorallium commune、Arenicolites isp.、R. ? jenense、Thalassinoides和Planolites，它们代表近端Cruziana ichnofacies。三角洲前缘合并的丘状交叉分层床缺乏生物扰动结构，主要与风暴相关的高频和/或高强度的偶发性侵蚀合并和沉积有关。根珊瑚的区别ichnospecies 有助于描述限制平行序列的侵蚀不连续性。海侵表面 (TS) 由R表征。jenense和R. commune。