Abstract
Due to the abundance, variety and preservation of the paleobiota, the Tlayúa quarry is one of the most important fossiliferous localities of the Albian of North America. It is located near Tepexi de Rodríguez, approximately 60 km SE of the city of Puebla, in the northern part of the Mixteca Alta region.
The name Tlayúa Formation is formally proposed for the limestone outcropping in the quarry and along the Barranca de Tlayúa. lt consists of an incomplete sequence of 300 m in thickness, that was divided in three members: Lower, Middle and Upper. The age of the formation in the type locality ranges from early to late Albian, time limits that can vary outside of the study area... In order to continue, download the full article in PDF
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