Jaisalmer Formation

The Jaisalmer Formation is a Middle to Late Jurassic-aged geologic formation located in India near the city of Jaisalmer that consists mainly of marine deposits. The formation was first identified and defined by geologist Richard Dixon Oldham in 1886.

Jaisalmer Formation
Stratigraphic range: Middle-Late Jurassic,
An outcrop of the Jaisalmer Formation which is the type locality for Tharosaurus indicus. Photographed between 2019-21.
TypeGeological formation
Sub-unitsBadabag Member, Fort Member, Hamira Member, Jajiya Member, Joyan Member, Kuldhar Member
UnderliesBaisakhi Formation
OverliesLathi Formation
ThicknessVariable, typically 120–170 km (75–106 mi)
Lithology
PrimarySiltstone, sandstone
OtherLimestone
Location
Coordinates26.911661°N 70.922928°E / 26.911661; 70.922928
Country India
ExtentJaisalmer
Type section
Named forJaisalmer, India
Named byRichard Dixon Oldham
Year defined1886

Dinosaur remains are among the known fossils recovered from this formation.

Strophodus jaisalmerensis, a hybodont, was named after this formation and the Jaisalmer District where its holotype was found.

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