Marble Hill Limestone, sample 2 (MH2), Lower Whitewater Formation, Bedford, KY (Ordovician of the United States)

Where: Kentucky (38.6° N, 85.3° W: paleocoordinates 25.8° S, 59.1° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Aphelognathus grandis conodont zone, Marble Hill Limestone Member (Whitewater Formation), Richmondian (449.5 - 443.7 Ma)

• Middle Richmondian age. Sample #2 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: sand shoal; lithified, dolomitic, shelly/skeletal, white packstone

• Sequence C5 (from Holland and Patzkowsky, 1996). Tidal channel-bar complex.
• Heavily recrystallized, partly dolomitic, skeletal (gastropod-rich) packstone

Size classes: macrofossils, mesofossils

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

Collection methods: bulk, mechanical,

• Bulk collection made in field and weighed, cleaned, prepped, and identified in lab at University of Cincinnati. Sample weighed 353.4 g. 38 specimens counted; 30 individuals estimated (using half of total disarticulated specimens with two parts plus number of articulated/intact specimens). Taxa counted using percent-coverage not included in this tally. Bryozoans and disarticulated 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 64167: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 03.09.2006

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.
 Phacopida - Calymenidae
Flexicalymene meeki Foerste 1910 trilobite
Fragmented trilobites, recrystallized
 Strophomenida -
Strophomenida indet. Opik 1934
2 fragmented and indeterminate valves, possibly Rafinesquina or Strophomena
 Strophomenida - Strophomenidae
? Holtedahlina sulcata Hall and Clarke 1892
1 brachial valve, recrystallized
Bivalvia indet. Linnaeus 1758 clam
4 disarticulated valves, recrystallized with iron-rich dolomite producing orange coloration; possibly Cycloconcha milleri but highly speculative
 Actinodontida - Cycloconchidae
? Cycloconcha milleri clam
3 disarticulated and fragmented valves, all recrystallized
 Modiomorphida - Modiomorphidae
Modiolopsis modiolaris Conrad 1838 clam
3 disarticulated and fragmented valves, all recrystallized
 Trochonematoidea - Lophospiridae
"Lophospira bowdeni" = Paupospira bowdeni
"Lophospira bowdeni" = Paupospira bowdeni Safford 1869 snail
24 shells, recrystallized and internal molds (steinkerns)
 Orthocerida - Orthoceratidae
? Orthoceratidae indet. McCoy 1844
1 conch fragment, recrystallized
 Trepostomata - Halloporidae
Halloporidae indet. Bassler 1911
Smooth, thin, branching halloporid trepostome, fragmented