Plum Point, south, Zone 12: Langhian, Maryland

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Cardiida - Veneridae
Cytherea staminea Conrad 1838
recombined as Melosia staminea
Venus mercenaria Linnaeus 1758
recombined as Mercenaria mercenaria
Gastropoda - Neogastropoda - Muricidae
Ecphora quadricostata (Conrad 1830)
var umbilicata
Reptilia - Testudines - Testudinidae
Hesperotestudo ducateli (Collins and Lynn 1936)
Weems 2023 1 specimen
Neural element (CMM-V-8882), collected by Victor Perez
Reptilia - Testudines - Emydidae
Chrysemys isoni Weems and George 2001
Weems 2023 1 specimen
Partial carapace and largely complete plastron of a single individual (CMM-V-8881), collected by Billy Palmer
Reptilia - Testudines - Cheloniidae
Procolpochelys grandaeva (Leidy 1861)
Weems 2023 1 specimen
Neural element (USNM 358021), collected by George Fonger
Reptilia - Testudines
Chelonia indet. (Latreille 1800)
Uhen 2007 1 specimen
synonym of Testudines
Mammalia - Sirenia - Dugongidae
Metaxytherium calvertense Kellogg 1966
Uhen 2007 1 specimen
synonym of Metaxytherium crataegense
Mammalia - Cetacea - Squalodontidae
Squalodon sp. Grateloup 1840
Uhen 2007 1 specimen
Mammalia - Cetacea - Delphinidae
Delphinidae indet. Gray 1821
Uhen 2007
Mammalia - Cetacea - Kentriodontidae
Kentriodon sp. Kellogg 1927
Uhen 2007 1 specimen
Mammalia - Cetacea - Eurhinodelphinidae
Xiphiacetus bossi (Kellogg 1925)
Godfrey and Lambert 2023
Chondrichthyes - Carcharhiniformes - Hemigaleidae
Hemipristis serra Agassiz 1835
Uhen 2007 1 specimen
see common names

Geography
Country:United States State/province:Maryland County:Calvert
Coordinates: 38.6° North, 76.5° West (view map)
Paleocoordinates:38.8° North, 73.2° West
Basis of coordinate:estimated from map
Time
Period:Neogene Epoch:Miocene
Stage:Langhian 10 m.y. bin:Cenozoic 5
Key time interval:Langhian
Age range of interval:15.97000 - 13.82000 m.y. ago
Stratigraphy
Geological group:Chesapeake Formation:Calvert Member:Plum Point
Regional section:Shattuck Regional bed:12
Regional order:bottom to top
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology:brown sandy claystone
Includes fossils?Y
Lithology description: brownish sandy clay
Environment:estuary/bay
Geology comments: sparse molluscs, low in diversity; subtropical environment in embayment and dry onshore; area not far from shore
Taphonomy
Modes of preservation:body,original phosphate
Size of fossils:macrofossils
Disassociated minor elements:some
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Metadata
Also known as:Kaufmann Camp
Database number:70819
Authorizer:M. Uhen, E. Vlachos, M. Nelson Enterer:M. Uhen, E. Vlachos, M. Nelson
Modifier:Z. Tieman Research group:marine invertebrate,vertebrate
Created:2007-04-09 13:26:13 Last modified:2010-07-05 20:25:02
Access level:the public Released:2007-04-09 13:26:13
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:

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]
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]
85705 R. E. Weems. 2023. Miocene and Pliocene Chelonians from the Calvert Cliffs and Nearby Regions. In S. J. Godfrey (ed.), The Geology and Vertebrate Paleontology of Calvert Cliffs, Maryland, USA – Volume 2 Turtles and Toothed Whales 3-48 [E. Vlachos/E. Vlachos]