Venericardia alticosta Bivalve Fossil

This bivalve fossil was found in Monroeville, Monroe County, Alabama in the Gosport Sand Formation.  It existed in the Eocene Epoch of the Paleogene Period. The fossil appears to be a Venericardia alticosta (Conrad 1833).  I think I have had this fossil since 2010 but just recently cleaned it and found its name. Thanks to Herb & Pam for the fossil.

Identification based on plate 167 figure 16 of Index Fossils of North America (Shimer & Shrock, 1944).

UV Fluorescent Mercenaria Clam Fossil

This post shows some images of a Giant Venus Clam fossil (aka Mercenaria permagna) of the Fort Drum Member, Nashua Formation of Ruck's Pit in Okeechobee County, Florida, USA. This animal lived in the Calabrian Stage (780,000 years ago to 1.8 million years ago) of the Pleistocene Epoch of the Quaternary Period.

What is special about this fossil is that the calcite crystals that form inside the shell are yellow fluorescent to ultraviolet (UV) light. The above image was using an LED array to illuminate it.

Thanks to Rusty for this fossil.

The Oyster Sidewalk

When I visited Savannah, Georgia USA in August 2017, found this interesting oyster concrete sidewalk. This sidewalk was at the corner of 300 Habersham St. and 321 E Liberty St. According to a 2017 report on historic pavement in Savannah Georgia, some sections of the city have "1950s Concrete with oyster shell aggregate". This sidewalk might be one of these sections.

I don't think these shells are fossils though maybe one day they will be. This concrete is an interesting way to use shells though and thought it might be worth noting.

Read report at this site:
http://savannahga.gov/DocumentCenter/View/10017/Report-on-Historic-Pavement-in-Savannah_v3?bidId=

See map of city with areas marked here:
http://www.historicpavement.com/savannah