کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6448210 1642065 2016 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Caprinula and Sauvagesia rudist faunas (Bivalvia) from the Cenomanian of NW Jordan. Stratigraphy and taxonomy
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فسیل شناسی
پیش نمایش صفحه اول مقاله
Caprinula and Sauvagesia rudist faunas (Bivalvia) from the Cenomanian of NW Jordan. Stratigraphy and taxonomy
چکیده انگلیسی
Three species of a canaliculated rudist Caprinula d'Orbigny, 1847, C. sharpei (Choffat, 1885), C. cedrorum (Blanckenhorn, 1890) and C. cf. boissyi d'Orbigny, 1840 and a radiolitid Sauvagesia sharpei (Bayle, 1857) are described from the Hummar Formation (upper Cenomanian) in NW Jordan, in the vicinity of Ajlun. Caprinula sharpei, C. cedrorum and S. sharpei are described for the first time from Jordan. Many specimens of S. sharpei are characterized by the presence of cavities flanking the lamellar myophores in the left valve and the apparence of the dorsal cavity and teeth/socket system moulds in the inner part of the outer shell layer of the right valve. A hiatus (or erosional unconformity) between Hummar Formation and upper Turonian Wadi As Sir Limestone Formation is suggested by the presence of karstic structures, reworked limestone clasts, and rudist fragments and a sharp boundary. Early diagenetic processes such as dissolution and silicification present in the loose rudist material is described.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cretaceous Research - Volume 58, March 2016, Pages 141-159
نویسندگان
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