Chesapeake Beach, south of, Zone 4-9: Burdigalian, Maryland

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Delphinus sp. Linnaeus 1758
Uhen 2007 1 specimen
    = Odontoceti indet.
Uhen 2500
Bivalvia - Pectinida - Pectinidae
Pecten humphreysii Conrad 1842
Ward 1992
Chesapecten coccymelus (Dall 1898)
Ward 1992
Bivalvia - Ostreida - Gryphaeidae
Pycnodonte percrassa (Conrad 1840)
Ward 1992
Bivalvia - Lucinida - Lucinidae
Lucinoma contracta (Say 1824)
Ward 1992
Bivalvia - Pholadida - Corbulidae
Corbula elevata Conrad 1838
recombined as Varicorbula elevata
Varicorbula elevata (Conrad 1838)
Ward 1992
Chondrichthyes - Odontaspidida - Isuridae
Oxyrhina elegans
Uhen 2007 3 elements
Chondrichthyes - Carcharhiniformes - Carcharhinidae
Galeocerdo contortus Gibbes 1847
Uhen 2007 2 elements
recombined as Physogaleus contortus
Chondrichthyes - Lamniformes - Lamnidae
Oxyrhina sillimani Gibbes 1847
Uhen 2007 1 element
recombined as Isurus sillimanii
Mammalia - Cetacea - Platanistidae
Araeodelphis natator n. gen., n. sp. Kellogg 1957
Kellogg 1957 2 specimens
Mammalia - Cetacea - Physeteridae
Orycterocetus crocodilinus Cope 1867
Uhen 2007 1 specimen
Mammalia - Cetacea - Eurhinodelphinidae
Schizodelphis barnesi (Myrick 1979)
Godfrey and Lambert 2023
Mammalia - Cetacea - Kentriodontidae
Kentriodon sp. Kellogg 1927
Uhen 2007 1 specimen
Mammalia - Cetacea
Rhabdosteus latiradix Cope 1867
Uhen 2007 1 specimen
nomen dubium belonging to Odontoceti
Priscodelphinus sp. Leidy 1851
Uhen 2007 1 specimen
nomen dubium belonging to Odontoceti
Reptilia - Testudines
Chelonia indet. (Latreille 1800)
Uhen 2007 1 specimen
synonym of Testudines
see common names

Geography
Country:United States State/province:Maryland County:Calvert
Coordinates: 38.7° North, 76.5° West (view map)
Paleocoordinates:38.9° North, 72.6° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
Key time interval:Burdigalian
Age range of interval:20.44000 - 15.97000 m.y. ago
Stratigraphy
Geological group:Chesapeake Formation:Calvert Member:Plum Point
Regional section:Shattuck Regional bed:4-9
Regional order:bottom to top
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: sandy claystone
Includes fossils?Y
Lithology description: no lithological description given
Environment:offshore
Geology comments: Biologically active, open marine environment
Taphonomy
Modes of preservation:body,original phosphate
Size of fossils:macrofossils
Preservation of anatomical detail:good
Articulated whole bodies:all
Collection methods and comments
Collection methods:surface (float),field collection
Collection size:1 specimens
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collection method comments: collected from a block of sediment apparently fallen from the cliff from Zone 10
Metadata
Also known as:Randle Cliff Beach, north
Database number:70593
Authorizer:M. Uhen, M. Nelson Enterer:M. Uhen, M. Nelson
Modifier:G. Varnham Research group:marine invertebrate,vertebrate
Created:2007-03-29 14:25:56 Last modified:2022-03-03 04:17:37
Access level:the public Released:2007-03-29 14:25:56
Creative Commons license:CC BY
Reference information

Primary reference:

23697. 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]

Secondary references:

33233 R. N. Benson. 1998. Radiolarians and Diatoms from the Pollack Farm Site, Delaware: Marine-Terrestrial Correlation of Miocene Vertebrate Assemblages of the Middle Atlantic Coastal Plain. Delaware Geological Survey Special Publication (21)5-19 [M. Uhen/Z. Tieman]
62154 S. J. Godfrey, L. G. Barnes, and O. Lambert. 2017. The Early Miocene odontocete Araeodelphis natator Kellogg, 1957 (Cetacea; Platanistidae), from the Calvert Formation of Maryland, U.S.A. Journal of Vertebrate Paleontology e1278607 [M. Uhen/M. Uhen]
85660 S. J. Godfrey and O. Lambert. 2023. Miocene Toothed Whales (Odontoceti) from Calvert Cliffs, Atlantic Coastal Plain, USA. Smithsonian Contributions to Paleobiology 107:29-186 [M. Uhen/M. Uhen]
11926 R. Kellogg. 1957. Two additional Miocene porpoises from the Calvert Cliffs Maryland. Proceedings of the United States National Museum 107(3387):279-337 [M. Uhen/M. Uhen/M. Uhen]
24251 M. D. Uhen. 2007. USNM Chesapeake Group Cetacean Collection Data. [M. Uhen/M. Uhen]
16985 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]