Locality 22, Golconda Formation, Crawford Co., Indiana (Carboniferous to of the United States)

Where: Crawford County, Indiana (38.2° N, 86.4° W: paleocoordinates 12.8° S, 28.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Golconda Formation, Brigantian to Brigantian (336.0 - 327.0 Ma)

• JA: originally entered as "Middle Chester," i.e., Hombergian = Brigantian to Pendleian

• formation-level stratigraphic resolution

Environment/lithology: marine; ooidal, shelly/skeletal, gray, argillaceous grainstone and shale

• golconda fm: light gray to tan, crinoidal, slightly oolitic; granular to crystalline and exhibits numerous fossil fragments on weathered surfaces; interbedded variegated red, olive green, and gray shale, as much as 20 ft. in thickness; chert, dolomite, limonite, and hematite are common minerals; pyrite also occurs.

Primary reference: J. Rodriguez. 1960. Invertebrate Fauna of the Golconda Formation (Middle Chester) of Indiana, Western Kentucky, and Southern Illinois. 1-259 [A. Miller/K. Layou/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 7023: authorized by Arnold Miller, entered by Karen Layou on 20.04.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

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Rhynchonellata
 Spiriferinida - Reticulariinidae
Reticulariina spinosa
Reticulariina spinosa Norwood and Pratten 1855
 Athyridida - Retziidae
Eumetria vera
 Athyridida - Athyrididae
Composita trinuclea, Cleiothyridina sublamellosa
Stenolaemata
 Cryptostomata - Fenestellidae
Archimedes macfarlani, Archimedes swallovanus
Crinoidea
 Monobathrida - Dichocrinidae
Pterotocrinus convexus