Eroded Spiny Crinoid Stem Fossil

 

Here is an image of an unidentified spiny crinoid stem fossil. It was found on a tombstone at St. Michael's Cemetery in Louisville, Kentucky, USA. The stone is composed of Bedford limestone (aka Indiana limestone, Salem limestone) from Indiana. It dates to the Mississippian Period. Fossil is about 4 mm wide.

Thanks to Kenny for the picture.

Glyptocrinus decadactylus Crinoid Calyx Fossil

 

This picture is of a crinoid calyx fossil called Glyptocrinus decadactylus (Hall, 1847). Picture was taken in 2016 at Indiana University Department of Geology. The fossil dates to the Ordovician Period and was found in the Alger Formation of Ohio, USA. Thanks to Kenny for the picture.

Coralliochama orcutti Bivalve Fossil

 

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.

Scytalocrinus robustus Crinoid Fossil

 

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.

Astraeospongium meniscus Fossil

 

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.