Bear Creek Quarry, (BC7), Kope Formation, Chile, Ohio (Ordovician of the United States)

Where: Washington County, Ohio (38.8° N, 84.2° W: paleocoordinates 27.0° S, 62.3° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Kope Formation, Caradoc (458.4 - 449.5 Ma)

• Middle Edenian age. Sample #7 collected. Details on stratigraphy and sedimentation (lithology), and additional details of gastropod and bivalve fauna are included from Novack-Gottshall and Miller (2003) [PBDB reference #18186] and field notes.

• bed-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, shelly/skeletal wackestone and lithified shale

• Sequence C1 (from Holland and Patzkowsky, 1996)
• Lenticular, mollusc-rich wackestone/packstone in thick shale bed.

Size classes: macrofossils, mesofossils

Preservation: cast, mold/impression, recrystallized, original calcite, replaced with calcite

Collection methods: bulk, mechanical,

• Bulk collection made in field and weighed, cleaned, prepped, and identified in lab at University of Cincinnati. Sample dimensions are 935.5 square-cm, weighing 4997 grams. At least 23 specimens counted; 23 individuals estimated (using half of total disarticulated specimens with two parts plus number of articulated/intact specimens). Fragmented trepostome bryozoans and fragmented trilobites were counted as estimated percent cover using standard percent cover reference chart.

Primary reference: P. M. Novack-Gottshall. 1999. Comparative geographic and environmental diversity dynamics of gastropods and bivalves during the Ordovician Radiation (M.S. thesis, University of Cincinnati). 1-191 [P. Novack-Gottshall/P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 64476: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 09.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Representative samples (standards) of species used for taxonomic identification reference are stored at the University of Cincinnati. Many unidentifiable bivalves are not included in taxonomic list.
Trilobita
 Asaphida - Asaphidae
Isotelus ? maximus Locke 1838 trilobite
Fragmented
Gastropoda
 Bellerophontida - Sinuitidae
Sinuites granistriatus Ulrich and Scofield 1897 snail
10 intact shells, all internal molds
 Bellerophontida - Plectonotidae
Tetranota bidorsata Hall 1847 snail
1 recrystallized specimen
 Murchisoniina - Lophospiridae
"Lophospira ? bowdeni" = Paupospira bowdeni
"Lophospira ? bowdeni" = Paupospira bowdeni Safford 1869 snail
3 internal molds, specimens slightly shorter than typical Lophospira (=Pauopspira) bowdeni
Cephalopoda
 Orthocerida - Proteoceratidae
Treptoceras duseri Hall and Whitfield 1875
1 phragmocone with recrystallized shell
Tergomya
 Cyrtonellida - Cyrtolitidae
Cyrtolites claysferryensis Wahlman 1992
1 recrystallized specimen
Bivalvia
 Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847 clam
1 valve, unsure whether internal mold or cast
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina alternata Conrad 1838
1 pedicle valve
Rhynchonellata
 Orthida - Dalmanellidae
"Onniella multisecta" = Cincinnetina multisecta
"Onniella multisecta" = Cincinnetina multisecta James 1871
3 pedicle valves
 Atrypida - Anazygidae
Zygospira modesta Hall 1847
2 articulated specimens
Stenolaemata
 Trepostomata - Halloporidae
Halloporidae indet. Bassler 1911
Smooth, thick, branching halloporid bryozoans, fragmented