Where: Calvert County, Maryland (38.4° N, 76.4° W: paleocoordinates 38.5° N, 74.6° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: St Mary's Formation (Chesapeake Group), Late/Upper Miocene (11.6 - 5.3 Ma)
• STRATIGRAPHIC RELATIONS: Unknown member of St Mary's Fm, Chesapeake Group. AGE: Late Miocene (equivalent to Tortonian) according to Ward (1992). STRATIGRAPHIC POSITION: Unknown position within formation.
• bed-level stratigraphic resolution
Environment/lithology: coastal; poorly lithified, coarse-grained, shelly/skeletal sandstone
Size class: macrofossils
Preservation: original aragonite, original calcite
Collection methods: bulk, sieve,
• COLLECTOR: Unknown collector. presumably K. Caster, 1960's. REPOSITORY: Department of Geology, University of Cincinnati.
Primary reference: 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 Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions.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]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 69032: authorized by Austin Hendy, entered by Austin Hendy on 15.02.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium attenuatum Say 1824 tusk shell | |
Bivalvia | |
Lucinoma contracta Say 1824 clam | |
Pandora sp. Bruguière 1797 clam | |
Corbula inaequalis Say 1824 clam | |
Chesacardium laqueatum Conrad 1830 cockle | |
Psammobia gubernatoria Glenn 1904 clam | |
Tellinidae indet. Blainville 1814 tellin clam | |
"Dosinia (Dosinidia) acetabulum" = Dosinia acetabulum, Mercenaria campechiensis, Mercenaria tetrica, Clementia (Clementia) inoceriformis
"Dosinia (Dosinidia) acetabulum" = Dosinia acetabulum Conrad 1832 venus clam
Mercenaria campechiensis Gmelin 1791 quahog
Mercenaria tetrica Conrad 1838 quahog
Clementia (Clementia) inoceriformis Wagner 1839 venus clam | |
Mactrodesma subponderosa d'Orbigny 1852 clam
"Spisula" subcuneata Conrad 1838 clam | |
Ensis directus Conrad 1844 clam | |
Astarte perplana Conrad 1840 clam | |
Chesapecten sp. Ward and Blackwelder 1975 scallop | |
Dallarca idonea Conrad 1832 clam
Anadara (Rasia) andrewsi Ward 1992 ark | |
Gastropoda | |
Crepidula fornicata, "Crucibulum (Crucibulum) costatum" = Crucibulum (Dispotaea) costata
Crepidula fornicata Linnaeus 1758 slipper shell
"Crucibulum (Crucibulum) costatum" = Crucibulum (Dispotaea) costata Say 1820 slipper shell | |
Urosalpinx subrusticus d'Orbigny 1852 murex snail | |
Volutifusus mutabilis Conrad 1834 volute | |
Busycon fusiforme whelk
Busycotypus sp. whelk | |
Astyris communis Conrad 1862 snail | |
Nassarius (Tritiaria) peralta Conrad 1868 snail
Bulliopsis quadrata Conrad 1830 snail
Bulliopsis marylandica Conrad 1862 snail | |
"Cancellaria (Cancellaria) alternata" = Cancellaria alternata
"Cancellaria (Cancellaria) alternata" = Cancellaria alternata Conrad 1834 snail | |
Conus deluvianus Green 1830 cone shell | |
"Mangelia sp." = Cythara (Mangelia)
| |
Polystira communis Conrad 1830 turrid | |
Euspira heros Say 1822 moon snail
Neverita duplicatus Say 1822 moon snail | |
"Turritella plebeia" = Mariacolpus plebeia, Turritella subponderosa
"Turritella plebeia" = Mariacolpus plebeia Say 1824 turret shell
Turritella subponderosa turret shell |