Ashlock Cemetary, (ATB) (Ordovician of the United States)

Also known as Ashlock Cemetary, (ATB), Tate Formation, Kentucky

Where: Kentucky (37.6° N, 84.6° W: paleocoordinates 27.4° S, 61.4° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Amplexograptus manitoulinensis graptolite zone, Tate Formation, Maysvillian (452.0 - 449.5 Ma)

• Late Maysvillian age. Sample #B 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. C2.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, bioturbated, shelly/skeletal wackestone and lithified mudstone

• Sequence C2 (from Holland and Patzkowsky, 1996)
• Irregularly bedded wackestone and mudstone. Horizontal bioturbation (?Planolites) is present.

Size classes: macrofossils, mesofossils

Preservation: mold/impression, recrystallized, coalified, original calcite, original carbon, 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 658.1 square-cm, weighing 2234 grams. At least 26 specimens counted; 21 individuals estimated (using half of total disarticulated specimens with two parts plus number of articulated/intact specimens). Fragmented trepostome bryozoans and 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 64417: 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 articulated specimen
 Asaphida - Asaphidae
Isotelus gigas Dekay 1824 trilobite
Fragments
Rhynchonellata
 Orthida - Platystrophiidae
Platystrophia ? ponderosa Foerste 1909
2 brachial valves, 1 pedicle valve, recrystallized
 Orthida - Plectorthidae
Hebertella occidentalis Hall 1847
1 brachial valve, recrystallized
Bivalvia
 Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847 clam
3 valves total, internal molds
 Ostreida - Pterineidae
"Caritodens demissa" = Pterinea demissa
"Caritodens demissa" = Pterinea demissa Conrad 1842 oyster
1 shell, articulated
 Modiomorphida - Modiomorphidae
Modiolopsis modiolaris Conrad 1838 clam
7 valves total, all bearing carbonized periostracum
Gastropoda
 Trochonematoidea - Lophospiridae
"Lophospira bowdeni" = Paupospira bowdeni
"Lophospira bowdeni" = Paupospira bowdeni Safford 1869 snail
5 internal molds
 Bellerophontida - Sinuitidae
Sinuites cancellatus Hall 1847 snail
1 internal mold
 Bellerophontida - Bellerophontidae
Sphenosphaera ? capax Ulrich and Scofield 1897 snail
1 specimen, partially recrystallized, partially internal mold
 Murchisoniina - Eotomariidae
Clathrospira sp. Ulrich and Scofield 1897 snail
2 internal molds
Cephalopoda
 Orthocerida - Proteoceratidae
Treptoceras duseri Hall and Whitfield 1875
1 phragmocone with recrystallized shell
Stenolaemata
 Trepostomata - Halloporidae
Halloporidae "indet. A" Bassler 1911
Encrusting halloporid trepostome, fragments
Halloporidae "indet. B" Bassler 1911
Smooth, thick, branching halloporid bryozoans, fragmented