Ashlock Cemetary, (AG4) (Ordovician of the United States)

Also known as Ashlock Cemetary, (AG4), Gilbert 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: Gilbert Formation, Maysvillian (452.0 - 449.5 Ma)

• Late Maysvillian age. Sample #4 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: lagoonal or restricted shallow subtidal; lithified, shelly/skeletal, gray limestone and lithified, silty shale

• Peritidal lagoon. Sequence C3 (from Holland and Patzkowsky, 1996)
• Dark blue-gray, nodular, irregularly bedded limestone interbedded with silty shale.

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 400.0 square-cm, weighing 1534 grams. At least 24 specimens counted; 19 individuals estimated (using half of total disarticulated specimens with two parts plus number of articulated/intact specimens). Fragmented trepostome bryozoans, trilobites, and crinoid columnals 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 64403: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 07.09.2006

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
1 hypostome
Strophomenata
 Strophomenida - Rafinesquinidae
Leptaena richmondensis Foerste 1909
1 valve
Rhynchonellata
 Orthida - Dalmanellidae
"Onniella meeki" = Cincinnetina meeki
"Onniella meeki" = Cincinnetina meeki Miller 1875
1 pedicle valve
 Orthida - Platystrophiidae
Platystrophia ponderosa Foerste 1909
4 brachial and 2 pedicle valves
Craniata
 Craniida - Craniidae
Petrocrania scabiosa Hall 1866
3 valves, disarticulated
Bivalvia
 Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847 clam
1 articulated specimen, 1 isolated valve
 Ostreida - Pterineidae
"Caritodens demissa" = Pterinea demissa
"Caritodens demissa" = Pterinea demissa Conrad 1842 oyster
1 disarticulated valve
 Modiomorphida - Allodesmatidae
Ischyrodonta ? elongata clam
2 disarticulated valves
Gastropoda
 Trochonematoidea - Lophospiridae
"Lophospira ? bowdeni" = Paupospira bowdeni
"Lophospira ? bowdeni" = Paupospira bowdeni Safford 1869 snail
4 specimens, internal molds
 Bellerophontida - Tropidodiscidae
Tropidodiscus sp. Meek and Worthen 1866 snail
1 specimen
Tergomya
 Cyrtonellida - Cyrtolitidae
Cyrtolites ? ornatus Conrad 1838
1 specimen, unclear whether recrystallized, internal mold, or organic cast (bryozoan encrustation)
Stenolaemata
 Cryptostomata -
Cryptostomata indet. Vine 1884
Thin, sheet-branching cryptostomate bryozoan, fragmented
 Trepostomata - Halloporidae
Halloporidae "indet. A" Bassler 1911
Encrusting halloporid trepostome
Halloporidae "indet. B" Bassler 1911
Smooth, thick, branching halloporid bryozoans, fragmented
Halloporidae "indet. C" Bassler 1911
Smooth, thin, branching halloporid trepostome, fragmented
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Disarticulated columnals