Where: Garrard County, Kentucky (37.7° N, 84.7° W: paleocoordinates 27.5° S, 63.5° W)
When: Curdsville Member (Lexington Limestone Formation), Soudleyan to Soudleyan (458.4 - 454.0 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified, massive, burrowed, calcareous packstone and lithified shale
•
•The limestone bedding surface is uneven and extensively burrowed. The presence of direct attachment to the substrate by edrioasteroids and crinoids holdfasts indicates the development of firm- to hardgrounds. Large ripples are present on the bedding plane, which indicates high-energy deposition. In between the largescale ripples are muddy shale lenses that were deposited in the topographic lows that commonly preserved intact echinoderm remains (Cressman 1973). This pattern of thin shale layers preserving intact echinoderms is repeated throughout the section with the bulk of the unit composed of massive limestones that contain taxonomically uninformative disarticulated and highly abraded fossil hash (Fig. 2).
Size class: macrofossils
Preservation: original calcite, replaced with calcite
Primary reference: P. W. Hearn and B. Deline. 2012. A new species of Paradiabolocrinus from the Upper Ordovician of central Kentucky, USA. Southeastern Geology 49(1):25-30 [S. Cole/S. Cole]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 190385: authorized by Selina Cole, entered by Selina Cole on 06.12.2017, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Edrioasteroidea | |
Edrioaster bigsbyi2 Billings 1858 | |
Crinoidea | |
Paradiabolocrinus teres n. sp. Hearn and Deline 2012 Sea lily | |
Paracrinoidea | |
Bistomiacystis schrantzi n. sp.2
Bistomiacystis schrantzi n. sp.2 Sumrall and Deline 2009 |