Catawba Collection 16 (Ordovician of the United States)

Where: Virginia (37.4° N, 80.9° W: paleocoordinates 29.7° S, 61.1° W)

• coordinate based on unpublished field data

• hand sample-level geographic resolution

When: Martinsburg Formation, Mohawkian (457.3 - 451.0 Ma)

• Holland and Patzkowsky, 1996 have the "Martinsburg" here as the "Reedsville"

•Based on Kreisa (1980, VA Tech Ph.D. dissertation), probably Trenton equivalent

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; poorly lithified, bioturbated, gray, silty, calcareous shale and lithified, shelly/skeletal, argillaceous, calcareous packstone

• Laminated to very thin-bedded, bioturbated, medium gray, calcareous, silty shale and lesser very thin-bedded, argillaceous, skeletal limestone (packstone)

Size classes: macrofossils, mesofossils

Primary reference: K. M. Layou. 2009. Ecological restructuring after extinction: the Late Ordovician (Mohawkian) of the eastern United States. Palaios 24:118-128 [K. Layou/K. Layou]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 76083: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 12.11.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• Dalmanella community
Trilobita
 Trinucleida - Trinucleidae
Cryptolithus sp. Green 1832 trilobite
 Asaphida - Asaphidae
Isotelus sp. Dekay 1824 trilobite
Strophomenata
 Strophomenida - Rafinesquinidae
Rhynchonellata
 Orthida - Dalmanellidae
Dalmanella bassleri Foerste 1909
Stenolaemata
  -
 Trepostomida - Monticuliporidae
Prasopora sp. Nicholson and Etheridge 1877
Bivalvia
 Modiomorphida - Modiomorphidae
Modiolopsis "sp. 2" Hall 1847 clam
"Quite small", "distinguished by nearly concentric ornamentation which intersects growth lines at an oblique angle." P.M. Novack-Gottshall thinks description indicates Modiolopsis concentrica.
Modiolopsis modiolaris Conrad 1838 clam
 Nuculanida - Malletiidae
Palaeoneilo sp. Hall and Whitfield 1869 clam
Gastropoda
  -
Gastropoda "planispiral" Cuvier 1795 snail
"Resembles Bucania."