78SK34 - Unit 9 (top): Serravallian, Maryland
collected by Kidwell 1978
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Thecostraca
- Balanomorpha
- Balanidae
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Balanus concavus
Bronn 1831
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545 specimens | |||||||||
| recombined as Concavus concavus | ||||||||||
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Malacostraca
- Decapoda
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Decapoda indet.
Latreille 1802
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5 specimens | |||||||||
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Gastropoda
- Trochidae
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Calliostoma sp.
Swainson 1840
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6 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Muricidae
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Ecphora sp.
Conrad 1843
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Gastropoda
- Naticidae
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Lunatia ? heros
(Say 1822)
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2 individuals | |||||||||
| recombined as Euspira heros | ||||||||||
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Crepidula sp.
Lamarck 1799
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1 individual | |||||||||
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Crucibulum sp.
Schumacher 1817
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43 individuals | |||||||||
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Gastropoda
- Turritellidae
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Turritella plebeia
Say 1824
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| recombined as Mariacolpus plebeia | ||||||||||
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Turritella variabilis
Conrad 1830
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| recombined as Turritella (Torcula) variabilis | ||||||||||
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Bivalvia
- Carditida
- Carditidae
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Carditamera protracta
Conrad 1843
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1 individual | |||||||||
| recombined as Cardita protracta | ||||||||||
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Bivalvia
- Carditida
- Astartidae
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Astarte thisphila
Glenn 1904
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3 individuals | |||||||||
| [entered as Astarte thisphilla] | ||||||||||
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Bivalvia
- Carditida
- Crassatellidae
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Eucrassatella turgidulus
(Conrad 1843)
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3 individuals | |||||||||
| recombined as Marvacrassatella turgidula | ||||||||||
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Bivalvia
- Pholadida
- Myidae
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? Sphenia sp.
Turton 1822
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1 individual | |||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Bicorbula idonea
(Conrad 1833)
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1 individual | |||||||||
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Caryocorbula inaequalis
(Say 1824)
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8 individuals | |||||||||
| original and current combination Corbula inaequalis | ||||||||||
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Bivalvia
- Cardiida
- Lasaeidae
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Aligena aequata
(Conrad 1843)
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3 individuals | |||||||||
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Bivalvia
- Cardiida
- Semelidae
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Semele carinata
(Conrad 1830)
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4 individuals | |||||||||
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Bivalvia
- Cardiida
- Psammobiidae
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Asaphis centenaria
(Conrad 1833)
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2 individuals | |||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Cerastoderma laqueatum
(Conrad 1830)
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9 individuals | |||||||||
| recombined as Chesacardium laqueatum | ||||||||||
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Bivalvia
- Cardiida
- Mactridae
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Spisula subparilis
(Conrad 1841)
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48 individuals | |||||||||
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Bivalvia
- Cardiida
- Veneridae
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Mercenaria sp.
Schumacher 1817
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4 individuals | |||||||||
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Dosinia acetabulum
(Conrad 1832)
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3 individuals | |||||||||
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? Pitar subnasuta
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6 individuals | |||||||||
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Bivalvia
- Solenida
- Pharidae
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Ensis ensiformis
(Conrad 1843)
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1 individual | |||||||||
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Bivalvia
- Hiatellida
- Hiatellidae
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Hiatella arctica
(Linnaeus 1767)
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1 individual | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Parvilucina crenulatus
(Conrad 1840)
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8 individuals | |||||||||
| recombined as Parvilucina crenulata | ||||||||||
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Bivalvia
- Arcida
- Arcidae
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Anadara staminea
(Say 1832)
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2 individuals | |||||||||
| recombined as Dallarca staminea | ||||||||||
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Bivalvia
- Ostreida
- Malleidae
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Isognomon maxillata
(Lamarck 1819)
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1 individual | |||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Chesapecten nefrens
Ward and Blackwlder 1975
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17 individuals | |||||||||
| recombined as Chesapecten (Chesapecten) nefrens | ||||||||||
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Bivalvia
- Mytilida
- Mytilidae
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Mytilus incurvus
|
7 individuals | |||||||||
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Modiolus ducatellii
(Conrad 1840)
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6 individuals | |||||||||
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Bivalvia
- Nuculida
- Nuculidae
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Nucula taphria
Dall 1898
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2 individuals | |||||||||
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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Lingulata
- Discinida
- Disciniidae
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Discinisca lugubris
(Conrad 1834)
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Echinoidea
- Clypeasteroida
- Abertellidae
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Abertella aberti
(Conrad 1842)
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Maryland | County: | Calvert |
| Coordinates: | 38.5° North, 76.5° West (view map) | ||||
| Paleocoordinates: | 38.7° North, 73.6° 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: | Boston Cliffs |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Boston Cliffs Mbr of the Choptank Fm, Chesapeake Grp. AGE: Middle Miocene. STRATIGRAPHIC POSITION: From top of unit 9. | |||||
Lithology and environment
| Primary lithology: | fine,shelly/skeletal unlithified sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Hashy, shell-supported fine sand. 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-555 | ||
| Database number: | 79111 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | G. Varnham | Research group: | marine invertebrate |
| Created: | 2008-02-25 19:48:45 | Last modified: | 2022-03-07 09:00:09 |
| Access level: | the public | Released: | 2008-02-25 19:48:45 |
| 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] |