ACl-4 (Cocoa Sand) (Eocene of the United States)

Where: Clarke County, Alabama (31.5° N, 87.8° W: paleocoordinates 31.9° N, 80.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Cocoa Sand Member (Yazoo Clay Formation), Priabonian (38.0 - 33.9 Ma)

• supposedly "Bartonian"; stage assignment based on Baum et al. 1994; Section ACl-4

• group of beds-level stratigraphic resolution

Environment/lithology: marine; unlithified sandstone

Size class: mesofossils

Primary reference: L. D. Toulmin. 1977. Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region. Geological Survey of Alabama, Monograph 13(1):1-602 [M. Patzkowsky/K. Layou/P. Mannion]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 3540: authorized by Mark Patzkowsky, entered by Karen Layou on 04.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Arthopoda indet.
crab carapace
Echinoidea
 Clypeasteroida - Protoscutellidae
Periarchus pileussinensis Ravenel 1844 sand dollar
Periarchus lyelli pileussinensis
 Spatangoida - Schizasteridae
"Schizaster armiger" = Paraster armiger
"Schizaster armiger" = Paraster armiger Clark and Twitchell 1915 heart urchin
 Spatangoida - Brissidae
Plagiobrissus dixie Cooke 1942 heart urchin
Gastropoda
 Neogastropoda - Conidae
"Conus tortilis" = Conus sauridens
"Conus tortilis" = Conus sauridens Conrad 1833 cone shell
Bivalvia
 Pectinida - Pectinoidae
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
originally entered as "Ostrea spp."
 Carditida - Carditidae
Venericardia sp. Lamarck 1801 clam
originally entered as "Venericardia spp."