ammonites
Locality 21, Glen Dean Limestone, Perry Co., IN (Carboniferous of the United States)

Where: Perry County, Indiana (37.9° N, 86.6° W: paleocoordinates 11.6° S, 27.2° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Dibunophyllum zone, Glen Dean Limestone Formation, Pendleian (326.4 - 318.1 Ma)

• collections taken from the Upper Glen Dean Limestone [JA: entered as Chesterian; the Glen Dean is late Hombergian = Pendleian]

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; shelly/skeletal, gray, argillaceous grainstone and shale

• medium to dk. gray, semicrystalline to crystalline limestone and argillaceous limestone occuring in beds that are usually less than 5 ft. thick and averaging about 2 ft. in thickness; dk. gray, thin bedded shale and argillaceous sandstone, locally fossiliferous, separate stratigraphically adjacent limestone beds

Preservation: replaced with silica

Collection methods: surface (in situ), mechanical,

• listed with locality information is identification as "collection 164"

Primary reference: A. S. Horowitz. 1956. Fauna of Glen Dean Limestone (Chester) in Indiana and Northern Kentucky. unpublished Ph.D. thesis, Indiana University 1-449 [A. Miller/K. Layou] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 6945: authorized by Arnold Miller, entered by Karen Layou on 13.04.2000