Skip to main content Accessibility help
×
Hostname: page-component-848d4c4894-cjp7w Total loading time: 0 Render date: 2024-06-24T08:18:21.286Z Has data issue: false hasContentIssue false

4 - Permo-Triassic boundary on the Indian peninsula

Published online by Cambridge University Press:  12 October 2009

Walter C. Sweet
Affiliation:
Ohio State University
Yang Zunyi
Affiliation:
China University of Geosciences, Wukan
J. M. Dickins
Affiliation:
Bureau of Mineral Resources, Canberra
Yin Hongfu
Affiliation:
China University of Geosciences, Wukan
Get access

Summary

Introduction

The Gondwana sequence of peninsular India is mainly terrestrial in nature and exhibits different patterns of sedimentation in each basin. This situation arose because deposition took place in linear, fault-bounded belts in which recurrent uplift or subsidence at varying rates created different tectonic regimes (Fig. 4.1). Consequently there are problems in interbasinal correlation. As a working system for correlation, however, various stratigraphic packages in a sequence are identified on the basis of lithic characters observed in discrete regions. These are then arrayed in a framework of greater spatial extent and this arrangement may be correlated precisely if biozones are available to use. However, biozones may or may not correspond with lithic units.

In recent years, a few widely spaced datum planes have been identified, along which biostratigraphic control matches well-delineated lithostratigraphic suites. The Permo-Triassic boundary has been one of the focal points for such an evaluation.

The conventional correlation of Gondwana formations is given in Fig. 4.2 (Datta & Mitra, 1982) and the Upper Permian–Lower Triassic interval is shown in greater detail in Fig. 4.3, which also includes information on general lithic characters. Some alterations based on recent data have been added.

The Upper Permian is characterized by diversification of the Glossopteris flora, which includes Glossopteris, Vertebraria, Raniganjia, Schizoneura, Tryzygia, Asansolia, and Damudopteris. The Lower Triassic flora records the advent of Dicroidium along with Lepidopteris, Podozamites, Macrotaenopteris, Pseudoctensis, and Pterophyllum. Palynologically, the Upper Permian assemblage is dominated by striate disaccate pollen (Striatopodocarpites, Faunipollenites, Crescentipollenites, Striatites, etc.) and qualifying taxa (Densipollenites, Gondisporites, Thymospora, Guttulapollenites, Indospora, etc.). On the other hand, the Lower Triassic assemblage is composed mainly of Klausipollenites, Lunatisporites, Lundbladispora, Densoisporites, Callumispora, Verrucosisporites, Playfordiaspora, Alisporites, and Satsangisaccites.

Type
Chapter
Information
Permo-Triassic Events in the Eastern Tethys
Stratigraphy Classification and Relations with the Western Tethys
, pp. 37 - 45
Publisher: Cambridge University Press
Print publication year: 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Save book to Kindle

To save this book to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×