کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8868622 | 1622106 | 2017 | 58 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Early Carnian conodont fauna at Yongyue, Zhenfeng area and its implication for Ladinian-Carnian subdivision in Guizhou, South China
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
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چکیده انگلیسی
Thus in the study area, the Zhuganpo Formation is generally of early Carnian (Julian 1) age whilst the Wayao Formation probably extends from the Julian 2 into the late Carnian (Tuvalian substage). The Ladinian-Carnian boundary (LCB) cannot be precisely defined due to the absence of the ammonoid Daxatina canadensis and the paucity of conodonts. However, the LCB is unlikely lower than the Yangliujing-Zhuganpo formation contact. The Julian 1-Julian 2 (early Carnian) substages boundary is defined in the uppermost Zhuganpo Formation by the occurrence of basal Julian 2 ammonoid Austrotrachyceras ex gr. A. austriacum and is also evidenced by the disappearance of most short-range Julian 1 conodonts in the overlying Wayao Formation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 486, 15 November 2017, Pages 142-157
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 486, 15 November 2017, Pages 142-157
نویسندگان
Z.T. Zhang, Y.D. Sun, X.L. Lai, M.M. Joachimski, P.B. Wignall,