Locality 20, Golconda Formation, Crawford Co., Indiana (Carboniferous to of the United States)

Where: Crawford County, Indiana (38.2° N, 86.4° W)

• Paleocoordinates: 23.3° S, 38.0° W (Wright 2013)

• 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 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 7021: authorized by Arnold Miller, entered by Karen Layou on 20.04.2000

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Cyclopentagonopa sp. n. sp.
Cyclopentagonopa sp. n. sp.
Cyclopentagonopa n. sp. 1
Anthozoa
 Stauriida - Hapsiphyllidae
Amplexizaphrentis spinulosus
Stenolaemata
 Cryptostomata - Fenestellidae
Archimedes swallovanus, Archimedes invaginatus, Archimedes macfarlani, Archimedes meekanus
Rhynchonellata
 Spiriferida - Elythidae
Torynifer setiger
 Athyridida - Athyrididae
Cleiothyridina sublamellosa, Composita trinuclea
 Spiriferinida - Reticulariinidae
Reticulariina spinosa
Reticulariina spinosa Norwood and Pratten 1855
Blastoidea
 Pentremitida - Pentremitidae
Pentremites pyriformis, Pentremites okawensis, Pentremites abruptus