Chesapeake Beach, south of, Zone 4-9 (Miocene of the United States)

Also known as Randle Cliff Beach, north

Where: Calvert County, Maryland (38.7° N, 76.5° W: paleocoordinates 38.9° N, 72.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Plum Point Member (Calvert Formation), Burdigalian (20.4 - 16.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: offshore; sandy claystone

• Biologically active, open marine environment
• no lithological description given

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Collection methods: surface (float),

• collected from a block of sediment apparently fallen from the cliff from Zone 10

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: taxonomic analysis

PaleoDB collection 70593: authorized by Mark Uhen, entered by Mark Uhen on 29.03.2007, edited by Margot Nelson

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines -
"Chelonia indet." = Testudines3
"Chelonia indet." = Testudines3 Batsch 1788 turtle
Mammalia
 Cetacea -
Rhabdosteus latiradix3 Cope 1867 toothed whale
 Cetacea - Platanistidae
Araeodelphis natator n. gen. n. sp.2
Araeodelphis natator n. gen. n. sp.2 Kellogg 1957 toothed whale
 Cetacea -
Priscodelphinus sp.3 Leidy 1851 toothed whale
 Cetacea - Kentriodontidae
Kentriodon sp.3 Kellogg 1927 toothed whale
 Cetacea - Physeteridae
Orycterocetus crocodilinus3 Cope 1867 sperm whale
 Cetacea - Eurhinodelphinidae
Schizodelphis barnesi1 Myrick 1979 toothed whale
Chondrichthyes
 Odontaspidida - Isuridae
Oxyrhina elegans3 mackerel shark
 Carcharhiniformes - Carcharhinidae
"Galeocerdo contortus" = Physogaleus contortus3
"Galeocerdo contortus" = Physogaleus contortus3 Gibbes 1847 requiem shark
 Lamniformes - Lamnidae
"Oxyrhina sillimani" = Isurus sillimanii3
"Oxyrhina sillimani" = Isurus sillimanii3 Gibbes 1847 mackerel shark
Bivalvia
 Pectinida - Pectinoidae
Chesapecten coccymelus4 Dall 1898 scallop
Pecten humphreysii4 Conrad 1842 scallop
 Ostreida - Gryphaeidae
Pycnodonte percrassa4 Conrad 1840 oyster
 Pholadida - Corbulidae
"Corbula elevata" = Varicorbula elevata, "Varicorbula elevata" = Varicorbula elevata4
"Corbula elevata" = Varicorbula elevata Conrad 1838 clam
"Varicorbula elevata" = Varicorbula elevata4 Conrad 1838 clam
 Lucinida - Lucinidae
Lucinoma contracta4 Say 1824 clam