Mineralogy, geochemistry, and K-Ar dating of feldspars and clays from an exceptional Cretaceous fossil locality (Tlayúa, Puebla, Mexico): Insights into the depositional and diagenetic ages and processes

Annotated Catalog of Arachnida in the Fossil Record of Mexico

“…The fossil material occurs in platy limestone exposed in the Middle Member of the Tlayúa Formation (Feldmann et al 1998, Applegate et al 2006, Riquelme et al 2021a) from the Late Cretaceous, Early Albian, according to zircon U-Pb dating (Riquelme et al 2021a). Other authors considered Late Albian (Applegate et al 2006) or Late Albian-Early Cenomanian (Solé et al 2022). The depositional environment suggested a lagoon system (Applegate et al 2006) or coastal marine basin (Kashiyama et al 2004;Riquelme et al 2021a).…”