Hanna Creek, sample 2 (HC2), Waynesville Formation, Brookville, IN (Ordovician of the United States)

Also known as Hannah Creek

Where: Indiana (39.6° N, 84.9° W: paleocoordinates 25.2° S, 58.2° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Waynesville Formation, Ashgillian (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: offshore shelf; lithified, burrowed, pyritic, shelly/skeletal claystone and lithified, shelly/skeletal wackestone

• Sequence C5 (from Holland and Patzkowsky, 1996)
• 18 cm thick, thick-bedded, massive, claystone ("butter shales") with occasional pyritized burrows (Chondrites, subvertically-oriented with respect to the sediment layer). Claystones predominate section, with occasional wackestone/packstone interbeds. Sample made directly above a 3 cm-thick Onniella-rich claystone above a packstone tempestite; next large limestone bed is 48 cm above this bottom limestone.

Size classes: macrofossils, mesofossils, microfossils

Preservation: cast, mold/impression, adpression, trace, recrystallized, coalified, original calcite, original chitin, original carbon, replaced with calcite, replaced with pyrite

Collection methods: bulk, mechanical,

• Bulk collection made in field and weighed, cleaned, prepped, and identified in lab at University of Cincinnati. Sample dimensions are 2212 cubic-cm. 94 specimens counted; 61 individuals estimated (using half of total disarticulated specimens with two parts plus number of articulated/intact specimens). 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 64232: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 04.09.2006

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.
 Phacopida - Calymenidae
Calymenidae indet. Milne-Edwards 1840 trilobite
2 cephala
Flexicalymene meeki Foerste 1910 trilobite
19 cephala
 Asaphida - Asaphidae
Isotelus maximus Locke 1838 trilobite
2 genal spines
Isotelus gigas Dekay 1824 trilobite
3 cephala
 Strophomenida - Rafinesquinidae
Rafinesquina ? alternata Conrad 1838
3 disarticulated valves
 Atrypida - Anazygidae
Zygospira modesta Hall 1847
2 specimens, articulated
 Orthida - Dalmanellidae
"Onniella meeki" = Cincinnetina meeki
"Onniella meeki" = Cincinnetina meeki Miller 1875
4 disarticulated valves
 Lingulida - Pseudolingulidae
Pseudolingula sp. Mickwitz 1909
16 disarticulated valves
 Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847 clam
1 external mold
 Ostreida - Pterineidae
"Caritodens demissa" = Pterinea demissa
"Caritodens demissa" = Pterinea demissa Conrad 1842 oyster
1 external mold
 Actinodontida - Cycloconchidae
Cycloconcha milleri clam
5 external molds, 2 pairs associated
 Modiomorphida - Modiomorphidae
Modiolopsis modiolaris Conrad 1838 clam
5 valves, external molds
Cymatonota recta Ulrich 1893 clam
8 valves, internal molds
Psiloconcha grandis Ulrich 1894 clam
1 external mold
Pholadomorpha pholadiformis Hall 1851 clam
3 valves, external molds, some with carbonized periostracum
 Unioni - Lyrodesmatidae
Lyrodesma major Ulrich 1879 clam
6 valves, external molds
 Nuculida - Cardiolariidae
Deceptrix albertina clam
6 valves, internal molds, tiny
 Cyrtonellida - Cyrtolitidae
Cyrtolites ornatus Conrad 1838
1 shell
 Trepostomata - Halloporidae
Halloporidae indet. Bassler 1911
Smooth, thick, branching bryozoan colonies, fragmented
 Homocrinida - Cincinnaticrinidae
Cincinnaticrinus sp. Warn and Strimple 1977 Sea lily
Disarticulated columnals