ammonites
Locality 23, Glen Dean Limestone, Breckinridge Co., KY (Carboniferous of the United States)

Where: Breckinridge County, Kentucky (37.8° N, 86.6° W: paleocoordinates 11.6° S, 27.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• collections taken from both the Lower and 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; ooidal, shelly/skeletal, gray, argillaceous grainstone and shale

• lower glen dean: hard, tan or gray, crystalline limestone that occurs in fairly massive bed; some beds oolitic; all beds fragmental in appearance and quite fossiliferous, common minerals include: dolomite, chert, pyrite, limonite, and hematite upper glen dean: 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,

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 unpublished Ph.D. thesis, Indiana University 1-449 [A. Miller/K. Layou] more details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 6964: authorized by Arnold Miller, entered by Karen Layou on 18.04.2000