Plum Point, north, Zone 10: Langhian, Maryland

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Actinopteri - Malacanthidae
Lopholatilus sp. Goode and Bean 1879
Uhen 2007
Reptilia - Testudines
Chelonia indet. (Latreille 1800)
Uhen 2007
synonym of Testudines
Mammalia - Cetacea
Parietobalaena palmeri Kellogg 1924
Uhen 2007 1 specimen
Mammalia - Cetacea - Squalodontidae
Squalodon murdochi n. sp. Godfrey and Lambert 2023
Godfrey and Lambert 2023 1 specimen
CMM-V-2287
Gastropoda - Turritellidae
Turritella plebeia Say 1824
recombined as Mariacolpus plebeia
Turritella variabilis Conrad 1830
recombined as Turritella (Torcula) variabilis
Gastropoda - Naticidae
Polynices heros (Say 1822)
recombined as Euspira heros
Gastropoda - Neogastropoda - Buccinidae
Siphonalia devexa (Conrad 1843)
recombined as Siphonalia devexus
Gastropoda - Neogastropoda - Muricidae
Ecphora tricostata Martin 1904
Bivalvia - Hiatellida - Hiatellidae
Glycimeris parilis
original and current combination Glycymeris
Bivalvia - Pholadida - Corbulidae
Corbula inaequalis Say 1824
Bivalvia - Cardiida - Veneridae
Venus rileyi Conrad 1838
recombined as Mercenaria campechiensis rileyi
Cytherea staminea Conrad 1838
recombined as Melosia staminea
Chione latilirata (Conrad 1841)
recombined as Lirophora (Lirophora) latilirata
Bivalvia - Lucinida - Lucinidae
Phacoides anodonta (Say 1824)
recombined as Stewartia anodonta
Bivalvia - Carditida - Crassatellidae
Crassatellites melinus
synonym of Crassatella
Bivalvia - Carditida - Astartidae
Astarte cuneiformis Conrad 1840
Bivalvia - Pectinida - Pectinidae
Pecten madisonius Say 1824
recombined as Chesapecten madisonius
Bivalvia - Ostreida - Malleidae
Melina maxillata (Lamarck 1819)
recombined as Isognomon maxillata
Bivalvia - Ostreida - Pinnidae
Atrina harrisii Dall 1898
Bivalvia - Arcida - Arcidae
Arca subrostrata Conrad 1841
recombined as Dallarca subrostrata
see common names

Geography
Country:United States State/province:Maryland County:Prince Frederick
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:15.98000 - 13.82000 m.y. ago
Stratigraphy
Geological group:Chesapeake Formation:Calvert Member:Plum Point
Regional section:Shattuck Regional bed:10
Regional order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Strontium dating indicates the age of bed 10 to be 16.2–15.8 Ma, or possibly somewhat older (16.4 Ma) [48, 49]. (Marx & Fordyce, 2015).
Lithology and environment
Primary lithology:red or brown,yellow sandy claystone
Includes fossils?Y
Lithology description: yellowish brown sandy clay
Environment:estuary/bay
Geology comments: sparse molluscs, low in diversity; subtropical environment in embayment and dry onshore; area not far from shore, bay, short-term eustatic transgression events, long-term regression trend
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Willow Beach north, Willows Beach north
Database number:60379
Authorizer:M. Uhen Enterer:M. Uhen
Modifier:M. Uhen Research group:marine invertebrate,vertebrate
Created:2006-05-11 12:12:35 Last modified:2023-08-17 08:01:17
Access level:the public Released:2006-05-11 12:12:35
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:

14892 L. de Verteuil and G. Norris. 1996. Dinoflagellate cyst zonation and allostratigraphy of the Chesapeake Group. Micropaleontology 42:1-25 [M. Uhen/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]
19909 A. J. W. Hendy, D. P. Buick, K. V. Bulinski, C. A. Ferguson, and A. I. Miller. 2008. Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions. [A. Hendy/A. Hendy/A. Hendy]
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]
55050 F. G. Marx and R. E. Fordyce. 2015. Baleen boom and bust: a synthesis of mysticete phylogeny, diversity and disparity. Royal Society Open Science 2:140434 [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]