Bear Creek Quarry, (BC3), Chile (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: Oulodus velicuspis conodont zone, Kope Formation, Edenian (460.9 - 449.5 Ma)

• Middle Edenian age. Sample #3 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, graded, shelly/skeletal wackestone and lithified shale

• Sequence C1 (from Holland and Patzkowsky, 1996)
• Lenticular, fossiliferous wackestone/packstone in shale. Sample is a portion of a wackestone with graded flute cast along bottom.

Size classes: macrofossils, mesofossils

Preservation: 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 322.6 square-cm, weighing 835 grams. At least 35 specimens counted; 33 individuals estimated (using half of total disarticulated specimens with two parts plus number of articulated/intact specimens). Fragmented trepostome bryozoans, crinoid columnals, 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 64426: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 08.09.2006

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
 Phacopida - Calymenidae
Flexicalymene meeki Foerste 1910 trilobite
1 specimen, intact, articulated
 Asaphida - Asaphidae
Isotelus maximus Locke 1838 trilobite
1 spine and fragments, approximately 3% by area
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina alternata Conrad 1838
3 pedicle valves
Rhynchonellata
 Atrypida - Anazygidae
Zygospira modesta Hall 1847
15 articulated specimens
 Orthida - Dalmanellidae
"Onniella multisecta" = Cincinnetina multisecta
"Onniella multisecta" = Cincinnetina multisecta James 1871
6 pedicle valves
Gastropoda
 Trochonematoidea - Lophospiridae
Lophospiridae indet. Wenz 1938 snail
Short, broad lophospirid, possibly Lophospira bowdeni (=Paupospira bowdeni), 6 internal molds
 Euomphalina - Platyceratidae
Cyclonema sp. Hall 1852 snail
1 shell, recrystallized
 Bellerophontida - Sinuitidae
Sinuites granistriatus Ulrich and Scofield 1897 snail
2 internal molds
Stenolaemata
 Trepostomata - Halloporidae
Halloporidae "indet. A" Bassler 1911
Smooth, thick, branching halloporid bryozoans, fragmented
Halloporidae "indet. B" Bassler 1911
Smooth, thin, branching halloporid trepostome, fragmented