Governor Run, Zone 17 (Miocene of the United States)

Where: Calvert County, Maryland (38.5° N, 76.5° W: paleocoordinates 38.7° N, 73.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

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

Environment/lithology: shoreface; yellow sandstone

• Mollusk-dense pale yellow-brown to pale orange well-sorted sand; sub-tropical to temperate, in a current-swept channel-like basin; area not far from shore, bay, short-term eustatic transgression events, long-term regression trend
• yellow sand

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 70838: authorized by Mark Uhen, entered by Mark Uhen on 09.04.2007, edited by Margaret Shalap

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Decapoda -
Cancroidea indet.2 Latreille 1802 crab
Mammalia
 Cetacea -
Siphonocetus priscus1 Leidy 1851 whale
"Megaptera expansa" = Eschrichtius expansus3 Cope 1868 whale
Chondrichthyes
 Carcharhiniformes - Hemigaleidae
Hemipristis serra3 Agassiz 1835 ground shark
 Carcharhiniformes - Galeocerdidae
Galeocerdo aduncus3 Agassiz 1835 tiger shark