Caulostrepsis taeniola and other sclerobionts on Crassostrea gryphoides shells from the Middle Miocene transgressive deposits of the Chellala Mountains (Algeria)

IF 2.2 4区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Journal of African Earth Sciences Pub Date : 2025-09-05 DOI:10.1016/j.jafrearsci.2025.105828

Abdelmounim Mazouzi , Mohammed Nadir Naimi , Amine Cherif

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Abstract

The ichnological study of the Middle Miocene deposits of the Chellala Mountains (Pre-Atlas domain, Algeria) revealed relatively abundant but less diverse sclerobiont communities that are preserved in Crassostrea gryphoides shells. The most prominent trace fossil found is Caulostrepsis taeniola. Other bioerosive traces are represented by Entobia geometrica, Gastrochaenolites isp., and Trypanites isp. The four borings consist of dwelling trace fossils (domichnia) produced by polychaete annelids and endolithic bivalves. Among sclerozoans, epibionts are dominated by the two barnacle species Balanus crenatus and B. stellaris. The ichnoassemblage is assigned to the Trypanites ichnofacies, indicating nearshore, high-energy deposition influenced by storm events, and post-mortem bioerosion. The study of the mid-Miocene transgression in this key area of northern Algeria has made it possible to produce a palaeogeographic map corresponding to the period of maximum sea level.

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阿尔及利亚Chellala山中中新世海侵沉积中长牡蛎壳上的带状链链菌及其他硬结物

对阿尔及利亚Chellala山脉（前阿特拉斯地区）中中新世沉积物的技术研究表明，在长牡蛎壳中保存了相对丰富但多样性较低的硬化生物群落。发现的最显著的痕迹化石是带状链霉菌。其他的生物侵蚀痕迹以Entobia geomeica、Gastrochaenolites isp为代表。和锥虫。四个钻孔由多毛纲环节动物和内石器双壳类动物产生的居住痕迹化石组成。在硬动物中，附生生物以两种藤壶类（Balanus crenatus和B. stellaris）为主。鱼类组合属于锥虫相，表明近岸、受风暴事件影响的高能沉积和死后生物侵蚀。对阿尔及利亚北部这一关键地区中新世中期海侵的研究，使绘制出与最高海平面时期相对应的古地理地图成为可能。

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来源期刊

Journal of African Earth Sciences 地学-地球科学综合

CiteScore

4.70

自引率

4.30%

发文量

240

审稿时长

12 months

期刊介绍： The Journal of African Earth Sciences sees itself as the prime geological journal for all aspects of the Earth Sciences about the African plate. Papers dealing with peripheral areas are welcome if they demonstrate a tight link with Africa. The Journal publishes high quality, peer-reviewed scientific papers. It is devoted primarily to research papers but short communications relating to new developments of broad interest, reviews and book reviews will also be considered. Papers must have international appeal and should present work of more regional than local significance and dealing with well identified and justified scientific questions. Specialised technical papers, analytical or exploration reports must be avoided. Papers on applied geology should preferably be linked to such core disciplines and must be addressed to a more general geoscientific audience.