Unit 1, Keefer Sandstone, North Rose Hill Section (Silurian to of the United States)

Where: Maryland (39.7° N, 78.8° W: paleocoordinates 29.1° S, 47.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Keefer Sandstone Formation (Clinton Group), Llandovery to Llandovery (443.4 - 423.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: foreshore; lithified sandstone

• Massive sandstone; upper 2 feet very calcareous, lower 1 foot iron stained and containing Stegerhynchus neglectum, Liocalymene clintoni, Stropheodonta, and crinoid stems; iron ore at very top.

Primary reference: H. P. Woodward. 1941. Silurian System of West Virginia. West Virginia Geological Survey 14:1-326 [P. Wagner/K. Koverman/K. Koverman]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 41009: authorized by Pete Wagner, entered by Kimberly Koverman on 05.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Calymenidae
Strophomenata
 Strophomenida - Strophodontidae
"Stropheodonta sp." = Strophomena (Strophodonta)
"Stropheodonta sp." = Strophomena (Strophodonta) Hall 1852
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae