T259 Mass Extinctions as Natural Experiments in Earth System Perturbations II

Wednesday, 18 October 2023
1:30 PM - 5:30 PM
301 / 302

DISTRIBUTION, AGE AND SIGNIFICANCE OF CRETACEOUS-PALEOGENE INTERTRAPPEAN BEDS IN THE DECCAN VOLCANIC PROVINCE, INDIA

Paper number: T259-5
Program: Technical Sessions
Time: 2:25 PM – 2:40 PM

Authors

  • Arya Tilak Presenting Author
    University of Houston, Houston, TX

Abstract

The Deccan Volcanic Province (DVP) is an extensive igneous region, covering approximately 500,000 sq. km in NW Peninsular India. Erupted due to the Indian Plate overriding the Reunion hotspot (64-65 Ma), the DVP exemplifies a Continental Flood Basalt (CFBs). Notably, this volcanic province is associated with the Cretaceous-Paleogene (K/Pg) mass extinction event, which led to the extinction of the dinosaurs and several other life forms.

This study focuses on the intertrappean beds, sedimentary horizons of diverse origins, sandwiched between episodes of Deccan Basalt eruptions. Each intertrappean bed marks a period of 'quiescence' where life forms proliferated, offering essential clues about the extinction patterns and paleoenvironment during this critical geological period. The distribution and fossil content of these intertrappean beds are of paramount importance in comprehending Late Cretaceous life.

Furthermore, our research addresses the survival patterns of biota through the K/Pg transition, as well as the deposition and distribution of intertrappean beds. We also explore future research opportunities in this region. A crucial aspect of our study is to establish a consensus on the most representative section bearing the K/Pg boundary in India, as this remains a subject of debate due to the exclusive fossil evidence found in different sections. By examining the fossil content, flora, fauna, and climatic changes in each section, we aim to define the most suitable section for the Cretaceous-Paleogene Boundary in India. Through this comprehensive review, we shed light on the biota that prevailed during this significant time in geological history.

Geological Society of America Abstracts with Programs. Vol. 55, No. 6

doi: 10.1130/abs/2023AM-394864

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