Foraminifers and conodonts from the late Viséan to early Bashkirian succession in the Saharan Tindouf Basin (southern Morocco): biostratigraphic refinements and implications for correlations in the western Palaeotethys
Foraminifers and conodonts from the late Viséan to early Bashkirian succession in the Saharan Tindouf Basin (southern Morocco): biostratigraphic refinements and implications for correlations in the western Palaeotethys
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DOI：
10.1002/gj.2519
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发表时间：
2014-05
影响因子：
1.8
通讯作者：
P. Cózar;P. Medina-Varea;I. Somerville;D. Vachard;S. Rodríguez;I. Said
中科院分区：
文献类型：
--
作者：
P. Cózar;P. Medina-Varea;I. Somerville;D. Vachard;S. Rodríguez;I. Said
北非摩洛哥南部的廷杜夫盆地石炭纪层序显示了密西西比纪至早宾夕法尼亚纪的海相地层，随后是宾夕法尼亚纪的陆相沉积。海相地层由浅水旋回台地层序组成，主要由页岩和细粒砂岩以及薄但横向持久的石灰岩/白云岩层组成。对廷杜夫向斜北方翼Djebel Ouarkziz山脉几个剖面的石灰岩床中有孔虫组合进行了研究;它们表明石灰岩的年龄范围从Asbian晚期（Viséan晚期）到Krasnopolyanian早期（Bashkirian早期）。有孔虫组合是丰富和多样的，比以前的研究表明，在该地区，以及为西部古特提斯其他地区的多样性更丰富。最丰富的组合记录在Serpukhovian，但不寻常的是，他们包含几个分类群，出现在西欧盆地早得多（在最新的维森）。相反，由于浅水相，牙形石组合很少，尽管在最年轻的石灰岩中记录了一些重要的分类群。版权所有© 2013约翰威利父子有限公司.
The Carboniferous succession in the Tindouf Basin of southern Morocco, North Africa, displays Mississippian to Early Pennsylvanian marine beds, followed by Pennsylvanian continental deposits. The marine beds comprise a shallow water cyclic platform sequence, dominated by shales and fine‐grained sandstones with thin but laterally persistent limestone/dolostone beds. Foraminiferal assemblages have been studied in the limestone beds in several sections from the Djebel Ouarkziz range in the northern limb of the Tindouf Syncline; they indicate that the age of the limestones range from late Asbian (late Viséan) to Krasnopolyanian (early Bashkirian). The foraminiferal assemblages are abundant and diverse, and much richer in diversity than those suggested by previous studies in the region, as well as for other areas of the western Palaeotethys. The richest assemblages are recorded in the Serpukhovian but, unusually, they contain several taxa which appear much earlier in Western European basins (in the latest Viséan). In contrast, conodont assemblages are scarce due to the shallow‐water facies, although some important taxa are recorded in the youngest limestones. Copyright © 2013 John Wiley & Sons, Ltd.