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Sreepat Jain ¹

Affiliations
1 Department of Geology, University of Rajasthan, Jaipur, 302004, IN

Abstract

Genus Phlycticeras Hyatt has so far been recorded from Upper Collovian sediments only. It has now been found associated with typical Middle Callovian forms from the Jumara Dome, Kachchh, Western India.

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Sreepat Jain ¹

Affiliations
1 Department of Earth Sciences, Florida International University, Miami - 33 199, US

Abstract

StrictIy localized collection of ammonites has helped demarcate the Bathonian-Callovian boundary in the Middle Jurassic outcrop of the Kuldhar section (Jaisalmer Basin). Latest Bathonian age has been assigned to the association of Sivajiceras congener (Waagen) [M] and Macrocephalites triangularis Spath [M] recorded from the lower "beds" of the Kuldhar Member ("bed" 4), facilitating the placement of the Bathonian-Callovian boundary between "beds" 4 and 5

Keywords

Middle Jurassic, Bathonian-Callovian boundary, Kuldhar section, Jaisalmer Basin, Western Rajasthan.

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