Planktonic foraminiferal quantitative analysis across the Campanian/Maastrichtian boundary at the Pondicherry area, Cauvery Basin, Southern India

被引：2
|
作者：
Nallamuthu, Malarkodi [1 ]
Orabi, Orabi Hussein [2 ]
Shashtri, Bhargava Sharma Chandrashekhara [1 ]
Srinivas, Chethan Kumar [1 ]
机构：
[1] Bangalore Univ, Dept Geol, Bangalore 560056, Karnataka, India
[2] Menoufia Univ, Fac Sci, Geol Dept, Shibin Al Kawm, Egypt
来源：
GEOLOGICAL JOURNAL | 2022年 / 57卷 / 03期
关键词：
bioevent; biostratigraphy; Cauvery Basin; late Campanian; Maastrichtian; planktonic foraminifera; Pondicherry; CRETACEOUS-TERTIARY BOUNDARY; BENTHIC FORAMINIFERA; EXMOUTH PLATEAU; KALAAT-SENAN; EAST-COAST; BIOSTRATIGRAPHY; SEA; OCEAN; STRATIGRAPHY; TURNOVER;
D O I：
10.1002/gj.4322
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The late Campanian/Maastrichtian succession exposed at Pondicherry area affords one of the finest exposed marine sections in Cauvery Basin is examined for their foraminiferal contents. The biostratigraphic distribution of 71 species of planktonic foraminifera has been used to diagnose 11 planktonic zones and subzones and correlated to the worldwide bioevent. During the late Campanian, a great transgression event occurred associated with the global warming (CF8b zone) trend indicated by large double-keeled foraminifera (Globotruncana aegyptiaca Nakkady) of oligotrophic conditions. The latest zone CF4 records a sharp decrease in Planktonic/Benthic (P/B), globotruncanids, rugoglobigerinids and heterohelicids implying a fall of sea level.
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页码：1061 / 1079
页数：19
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