78SK35 - Unit 5: Serravallian, Maryland
collected by Kidwell 1978

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Thecostraca - Balanomorpha - Balanidae
Balanus concavus Bronn 1831
18 specimens
recombined as Concavus concavus
Gastropoda - Epitoniidae
Scala ? marylandica Martin 1904
1 individual
Gastropoda - Naticidae
Lunatia heros (Say 1822)
2 individuals
recombined as Euspira heros
Gastropoda - Turritellidae
Turritella plebeia Say 1824
12 individuals
recombined as Mariacolpus plebeia
Bivalvia - Carditida - Astartidae
Astarte thisphila Glenn 1904
1 individual
Bivalvia - Carditida - Crassatellidae
Eucrassatella turgidulus (Conrad 1843)
recombined as Marvacrassatella turgidula
Bivalvia - Pholadida - Myidae
Paramya subovata (Conrad 1845)
1 individual
Bivalvia - Pholadida - Corbulidae
Bicorbula idonea (Conrad 1833)
5 individuals
Caryocorbula inaequalis (Say 1824)
1 individual
original and current combination Corbula inaequalis
Bivalvia - Cardiida - Tellinidae
Tellinidae indet. Blainville 1814
1 individual
Bivalvia - Cardiida - Cardiidae
Cerastoderma laqueatum (Conrad 1830)
1 individual
recombined as Chesacardium laqueatum
Bivalvia - Cardiida - Mactridae
Spisula subparilis (Conrad 1841)
7 individuals
Bivalvia - Cardiida - Veneridae
Mercenaria plena Conrad 1869
1 individual
Dosinia acetabulum (Conrad 1832)
3 individuals
Bivalvia - Cardiida - Glossidae
Glossus cf. ignolea
54 individuals
Bivalvia - Lucinida - Lucinidae
Parvilucina crenulatus (Conrad 1840)
7 individuals
recombined as Parvilucina crenulata
Bivalvia - Mytilida - Mytilidae
? Mytilus sp. Linnaeus 1758
Lingulata - Discinida - Disciniidae
Discinisca lugubrius
1 individual
see common names

Geography
Country:United States State/province:Maryland County:Calvert
Coordinates: 38.4° North, 76.4° West (view map)
Paleocoordinates:38.6° North, 73.5° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
Stage:Serravallian 10 m.y. bin:Cenozoic 5
Key time interval:Serravallian
Age range of interval:13.82000 - 11.63000 m.y. ago
Stratigraphy
Geological group:Chesapeake Formation:Choptank Member:Drumcliff
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Drumcliff Mbr of the Choptank Fm, Chesapeake Grp. AGE: Middle Miocene. STRATIGRAPHIC POSITION: From unit 5.
Lithology and environment
Primary lithology:fine,medium,shelly/skeletal unlithified sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Fine-medium shelly sand, shell hash. LITHIFICATION: Unlithified, based on visual inspection of collection by enterer.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Shallow marine siliciclastic.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:bulk,sieve,field collection
Minimum sieve size:1.000
Reason for describing collection:taphonomic analysis
Museum repositories:YPM
Collectors:Kidwell Collection dates:1978
Collection method comments: COLLECTOR: S.K. Kidwell, 1978. REPOSITORY: Peabody Museum of Natural History, Yale University.
Taxonomic list comments:COVERAGE: Exhaustive for gastropoda, bivalvia, and scaphopoda. NOMENCLATURE: Somewhat modern. Identifications are based on Martin (1904) for gastropods and bivalves, with revisions following subsequent publications.
Metadata
Also known as:B-560
Database number:79115
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:G. Varnham Research group:marine invertebrate
Created:2008-02-25 19:58:50 Last modified:2022-03-07 09:15:37
Access level:the public Released:2008-02-25 19:58:50
Creative Commons license:CC BY
Reference information

Primary reference:
26560. S. M. Kidwell. 1982. Stratigraphy, invertebrate taphonomy and depositional history of the Miocene Calvert and Choptank Formations, Atlantic Coastal Plain. Unpublished PhD thesis, Yale University 1-511 [A. Hendy/A. Hendy/A. Hendy]