PBDB Collection

Chesapeake Bay (Upper Calvert): Burdigalian - Langhian, Maryland

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Reptilia - Testudines - Testudinidae

	Floridemys hurdi n. sp. Weems and George 2013	Weems and George 2013
	CMM 4666 (holotype), nuchal (Weems and George 2013, fig. 12)
Reptilia - Testudines

	Chelonia indet. (Latreille 1800)	Uhen 2007
	synonym of Testudines
Mammalia - Proboscidea - Mammutidae

	Gomphotherium calvertensis Gazin and Collins 1950
	= Gomphotherium obscurum Leidy 1869	Alroy 2002
	beds 13 and 14
Mammalia - Perissodactyla - Rhinocerotidae

	? Aphelops sp. Owen 1845
	beds 13 and 14
Mammalia - Perissodactyla - Tapiridae

	Tapiravus cf. validus (Marsh 1871)
	(2 measurements)
Mammalia - Perissodactyla - Equidae

	Merychippus sp. Leidy 1856
	= Equinae indet. Steinmann and Döderlein 1890	Alroy 2002
	said to "probably" be from bed 13 or 14

	Archaeohippus sp. Gidley 1906
	provenance is questioned by Wright and Eshelman 1987 on biochronological grounds, but their argument seems poor in light of the Norden Bridge fauna
Mammalia - Cetacea - Physeteridae

	Orycterocetus crocodilinus Cope 1867	Kellogg 1965
Mammalia - Protoceratidae

	Dromomerycinae indet. (Frick 1937)
	= Protoceratidae indet. Marsh 1891	Webb 1998
Mammalia - Tayassuidae

	Prosthennops niobrarensis Colbert 1935
	recombined as Colbertchoerus niobrarensis
	Governor's Run Road, ? bed 15

	Prosthennops xiphodonticus Barbour 1925
	recombined as Stirtonhyus xiphodonticus
	Kenwood Beach, ? bed 14; Scientist's Cliff, bed 14 (1 measurement)
Mammalia - Camelidae

	? Aepycamelus sp. Macdonald 1956
Mammalia - Carnivora - Amphicyonidae

	Amphicyon sp. Lartet 1836
	= Amphicyonidae indet. Haeckel 1886	Alroy 2002
Chondrichthyes - Myliobatiformes - Aetobatidae

	Aetobatis arcuatus Agassiz 1843	Leriche 1942
	synonym of Aetobatus irregularis
Chondrichthyes - Myliobatiformes - Myliobatidae

	Rhinoptera sp. Cuvier 1829	Leriche 1942
Chondrichthyes - Heterodontiformes - Heterodontidae

	Sphyrna prisca Agassiz 1843	Leriche 1942
	recombined as Cestracion prisca
	var. eastmani, n. var.
Chondrichthyes - Squatinidae

	Squatina occidentalis Eastman 1904	Leriche 1942
Chondrichthyes - Squalomorphii - Hexanchidae

	Notidanus primigenius Agassiz 1835	Leriche 1942
	recombined as Notorhynchus primigenius
Chondrichthyes - Carcharhiniformes - Galeocerdidae

	Galeocerdo aduncus (Agassiz 1835)	Leriche 1942
Chondrichthyes - Carcharhiniformes - Hemigaleidae

	Hemipristis serra Agassiz 1835	Leriche 1942
Chondrichthyes - Carcharhiniformes - Sphyrnidae

	Sphyrna laevissima (Cope 1867)	Leriche 1942
Chondrichthyes - Carcharhiniformes - Carcharhinidae

	Prionodon egertoni (Agassiz 1843)	Leriche 1942
Chondrichthyes - Lamniformes - Lamnidae

	Oxyrhina hastalis Agassiz 1838	Leriche 1942
	recombined as Carcharodon hastalis

	Oxyrhina retroflexa Agassiz 1838	Leriche 1942
	recombined as Isurus retroflexus
Chondrichthyes - Lamniformes - Odontaspididae

	Odontaspis actutissima (Agassiz 1843)	Leriche 1942

	Odontaspis cuspidata (Agassiz 1843)	Leriche 1942
	recombined as Araloselachus cuspidatus
see common names

Geography

Country:	United States	State/province:	Maryland	County:	Calvert
Coordinates:	38.4° North, 76.5° West (view map)
Paleocoordinates:	38.6° North, 72.8° West
Basis of coordinate:	based on political unit

Time

Period:	Neogene	Epoch:	Miocene
10 m.y. bin:	Cenozoic 5
*Period:	Tertiary
Key time interval:	Burdigalian - Langhian
Age range of interval:	20.44000 - 13.82000 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Geological group:	Chesapeake	Formation:	Calvert	Member:	Plum Point
Regional section:	Shattuck	Regional bed:	4-13
Regional order:	bottom to top
Stratigraphy comments: Beds 4–13 are late Burdigalian-Langhian

Lithology and environment

Primary lithology:	sandy claystone
Includes fossils?	Y
Environment:	transition zone/lower shoreface
Geology comments: Mollusk (especially Pycnodonte percrassa)-bearing blue-green (at the base) to greenish (in the middle) to brown (at the top) sandy clay. Subtropical, not far from shore

Taphonomy

Modes of preservation:	body
Size of fossils:	macrofossils

Collection methods and comments

Reason for describing collection:	general faunal/floral analysis
Taxonomic list comments:beds 13 to 15; 15 is in the Choptank Fm. according to Tedford and Hunter but in the Calvert Fm. according to Wright and Eshelman 1987unless otherwise noted, provenance at this level is assumed by Tedford and HunterCat Creek and Drum Cliff are in St. Mary's Co.: Wright and Eshelman 1987

Metadata

Also known as:	Cat Creek; Chesapeake Beach; Drum Cliff; Governor Run; Kenwood Beach; Long Beach; Plum Point; Randle Cliff; Scientist's Cliff
Database number:	18518
Authorizer:	J. Alroy, M. Uhen, E. Vlachos	Enterer:	J. Alroy, M. Uhen, E. Vlachos
Modifier:	G. Varnham	Research group:	vertebrate
Created:	1993-02-18 00:00:00	Last modified:	2022-03-03 05:44:47
Access level:	the public	Released:	1993-02-18 00:00:00
Creative Commons license:	CC BY

Reference information

Primary reference:

3383.

R. H. Tedford and M. E. Hunter. 1984. Miocene marine-nonmarine correlations, Atlantic and Gulf Coastal Plains, North America. Palaeography, Palaeoclimatology, Palaeoecology 47:129-151 [J. Alroy/J. Alroy/M. Uhen]

Secondary references:

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
30730		G. de Beaumont. 1976. Note sure un fragment de dentition de Myliobatide (Chondrichthyen, Batoide). Bulletin de la Societe Vaudoise des Sciences Naturelles 73(2):181-187 [M. Uhen/M. Uhen]
15352		R. Kellogg. 1965. The Miocene Calvert sperm whale Orycterocetus. Bullten of the United States National Museum 247(2):47-63 [M. Uhen/M. Uhen]
28099		M. Leriche. 1942. Contribution a l'etude des faunes ichthyologiques marines des terrains tertiaires de la plaine cotiere Atlantique et du centre des Etats-Unis. Memoires de la Societe Geologique de France (Nouvelle Serie) 45:1-111 [M. Uhen/M. Uhen]
24251		M. D. Uhen. 2007. USNM Chesapeake Group Cetacean Collection Data. [M. Uhen/M. Uhen]
32709		L. W. Ward and G. W. Andrews. 2008. Stratigraphy of the Calvert, Choptank, and St. Marys Formations (Miocene) in the Chesapeake Bay Area, Maryland and Virginia. Virginia Museum of Natural History Memoir 1-169 [M. Uhen/M. Uhen]
6229		S. D. Webb. 1998. Hornless ruminants. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary mammals of North America 463-476 [J. Alroy/J. Alroy/J. Alroy]
64777		R. E. Weems and R. A. George. 2013. Amphibians and nonmarine turtles from the Miocene Calvert Formation of Delaware, Maryland, and Virginia (USA). Journal of Paleontology 87(4):53-66 [E. Vlachos/E. Vlachos]
3776		D. B. Wright and R. E. Eshelman. 1987. Miocene Tayassuidae (Mammalia) From the Chesapeake Group of the Mid-Atlantic Coast and their Bearing on Marine-nonmarine correlation. Journal of Paleontology 61(3):604-618 [J. Alroy/J. Alroy/M. Uhen]