Governor Run, Zone 13 (Miocene of the United States)

Where: Calvert County, Maryland (38.5° N, 76.5° W: paleocoordinates 38.7° N, 73.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Plum Point Member (Calvert Formation), Langhian (16.0 - 13.8 Ma)

Environment/lithology: estuary or bay; blue claystone

• sparse molluscs, low in diversity; subtropical environment in embayment and dry onshore; area not far from shore, bay, short-term eustatic transgression events, long-term regression trend
• bluish clay

Size class: macrofossils

Primary reference: G. B. Shattuck. 1904. Geological and paleontological relations, with a review of earlier investigations. Maryland Geological Survey Miocene Text xxxiii-clv [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 70834: authorized by Mark Uhen, entered by Mark Uhen on 09.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cetacea -
Parietobalaena palmeri2 Kellogg 1924 whale
 Cetacea - Tranatocetidae
Mesocetus siphunculus3 Cope 1895 whale
 Cetacea -
Pelocetus calvertensis3 Kellogg 1965 whale
Chondrichthyes
 Lamniformes - Cetorhinidae
Cetorhinus sp.1 de Blainville 1816 basking shark