کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
9539050 1359963 2005 14 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Responses of inoceramid bivalves to environmental disturbances across the Cenomanian/Turonian boundary in the Yezo forearc basin, Hokkaido, Japan
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موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فسیل شناسی
پیش نمایش صفحه اول مقاله
Responses of inoceramid bivalves to environmental disturbances across the Cenomanian/Turonian boundary in the Yezo forearc basin, Hokkaido, Japan
چکیده انگلیسی
This paper describes the responses of inoceramid bivalves to events across the Cenomanian/Turonian boundary (C/T boundary), and the marine environments inferred from these responses, within the Yezo forearc basin, Hokkaido (northern Japan), as based on examination of newly collected specimens and a literature survey. All Late Cenomanian inoceramid species in this region became extinct at the C/T boundary and were replaced by newly evolved Early Turonian taxa. This change in generic composition, accompanied by stunting, a decrease in interspecific size variation, and predominance of cosmopolitan species evidently occurred immediately after the C/T transition. Based on these results and on previous studies, inoceramids would have been affected by oxygen-depleted conditions associated with Oceanic Anoxic Event 2. Consequently, niches became vacant in the Yezo forearc basin just after the C/T transition, and small, cosmopolitan species invaded those niches in the early Early Turonian. Faunal stunting suggests that oligotrophic conditions spread into the basin immediately after the C/T boundary.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cretaceous Research - Volume 26, Issue 4, August 2005, Pages 567-580
نویسندگان
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