Ashlock Cemetary, (AG15), Gilbert Formation, Kentucky (Ordovician of the United States)

Where: Kentucky (37.6° N, 84.6° W: paleocoordinates 27.6° S, 63.5° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Gilbert Formation, Caradoc (458.4 - 449.5 Ma)

• Late Maysvillian age. Sample #15 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 525.8 square-cm, weighing 1543 grams. At least 15 specimens counted; 14 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 64404: 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.
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Disarticulated columnals
Stenolaemata
 Cryptostomata -
Cryptostomata indet. Vine 1884
Thin, sheet-branching cryptostomate bryozoan, fragmented
Rhynchonellata
 Atrypida - Anazygidae
Zygospira ? modesta Hall 1847
3 specimens, articulated
 Orthida - Platystrophiidae
Platystrophia ponderosa Foerste 1909
3 brachial valves
 Orthida - Plectorthidae
Hebertella occidentalis Hall 1847
2 pedicle valves
Craniata
 Craniida - Craniidae
Petrocrania scabiosa Hall 1866
1 valve
Bivalvia
 Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847 clam
1 recrystallized specimen, 1 internal mold valve
Gastropoda
 Bellerophontida - Bucaniidae
Salpingostoma sp. Roemer 1876 snail
2 specimens: 1 recrystallized, 1 internal mold. This species is not Salpingostoma richmondensis
 Murchisoniina - Lophospiridae
"Lophospira bowdeni" = Paupospira bowdeni
"Lophospira bowdeni" = Paupospira bowdeni Safford 1869 snail
1 specimen
Trilobita
 Asaphida - Asaphidae
Isotelus maximus Locke 1838 trilobite
Fragmented