This picture is of a rudist bivalve fossil called Coralliochama orcutti (White, 1885). Picture was taken in 2016 at Indiana University Department of
Geology. The fossil dates to the Upper Cretaceous Period and was
found in the Rosario Formation of Punta Banda, Baja California, Mexico. Thanks to Kenny for the picture.
This picture is of a crinoid calyx fossil called Scytalocrinus robustus (Hall, 1861). Picture was taken in 2016 at Indiana University Department of
Geology. The fossil dates to the Middle Mississippian Period and was found in Crawfordsville, Indiana USA (Edwardsville formation; Valmeyeran series). Thanks to Kenny for the picture.
This picture is of a heteractinid sponge fossil called Astraeospongium meniscus (Römer, 1854). Picture was taken in 2016 at Indiana University Department of Geology. The fossil dates to the Middle Silurian Period and was found in western Tennessee. Thanks to Kenny for the picture.
