Record of the Middle Albian (Lower Cretaceous) ammonoids from the Cauvery Basin, southern India

ABSTRACT

The two Middle Albian index ammonoid species Hamites (Hamites) attenuatus and Hamites (Hamites) rectus are recorded for the first time from the Karai Formation in the Ariyalur Sub-basin of the Cauvery Basin. The part of succession under the present endeavour has yielded eight ammonoid specimens from four ammonoid levels which are systematically described in the Cauvery Basin. Biostratigraphic evaluation of these ammonoids enables the authors to formulate Hamites (Hamites) attenuatus Zone which is broadly correlatable to the Hoplites dentatus Zone – Euhoplites lautus Zone interval of the standard ammonoid zonal scheme.

KEYWORDS:

• Middle Albian
• ammonoid
• Hamites
• Karai Formation
• Cauvery Basin

Acknowledgments

The authors extend their gratefulness to the Department of Geology, BHU, for providing available facilities. Jai Prakash Gautam acknowledges the financial support of UGC in the form of RGNF (2016-17/RGNF-2015-17-SC-UTT-784).

Disclosure statement

No potential conflict of interest was reported by the authors.

Correction Statement

This article has been corrected with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by UGC-Rajiv Gandhi National Fellowship [2016-17/RGNF-2015-17-SC-UTT-784].