Hellen Creek, Zone 19 (Miocene of the United States)

Where: Calvert County, Maryland (38.4° N, 76.5° W: paleocoordinates 38.5° N, 73.6° W)

• coordinate estimated from map

When: Boston Cliffs Member (Choptank Formation), Serravallian (13.8 - 11.6 Ma)

Environment/lithology: marine; fine-grained, argillaceous, silty sandstone

• sand; silty, clayey, fine, very shelly. Abundant mollusks, aragonitic taxa very rotten.

Primary reference: L. W. Ward. 1992. Molluscan biostratigraphy of the Miocene Middle Atlantic Coastal Plain of North America. Virginia Museum of Natural History 2 [A. Miller/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 71638: authorized by Mark Uhen, entered by Mark Uhen on 02.05.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Pectinoidae
"Chesapecten nefrens" = Chesapecten (Chesapecten) nefrens
"Chesapecten nefrens" = Chesapecten (Chesapecten) nefrens Ward and Blackwlder 1975 scallop
 Arcida - Arcidae
 Carditida - Crassatellidae
 Cardiida - Veneridae
Mercenaria cuneata Conrad 1869 quahog