Unit 12, Middle Tonoloway Limestone, McKenzie-Pinto Section (Silurian to of the United States)

Where: Allegany County County, Maryland (39.6° N, 78.8° W: paleocoordinates 32.7° S, 43.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tonoloway Limstone Formation, Ludlow to Ludlow (427.4 - 419.2 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, gray limestone

• Gray interbedded crystalline and non-crystalline limestone.

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 41645: authorized by Pete Wagner, entered by Kimberly Koverman on 19.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Metacopida -
 Palaeocopida - Beyrichiidae
 Platycopida -
 Tentaculitida - Tentaculitidae
Tentaculites gyracanthus
Tentaculites gyracanthus var. marylandicus
 Athyridida - Meristellidae
 Rhynchonellida - Camarotoechiidae