Glen Park Formation, stratigraphic locality 392 (Horton Creek), Pike Co., IL, Ea (Carboniferous of the United States)

Where: Pike County, Illinois (39.6° N, 91.0° W: paleocoordinates 21.7° S, 36.9° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Glen Park Formation, Tournaisian (358.9 - 346.7 Ma)

• This member was previously known as the Horton Creek member of the Hannibal Formation. Due to the existence of a paraconformity between the Devonian-Mississippian contact, the exact stratigraphic position of these beds has been corrected several times since these sections were first documented in the early 1900's. Carter contains a complete description of the history of work done on these sections.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; silty dolomite

• carter states that the fossils are found in only one lithology at each collecting locality, often only in one bed. later in the paper he describes that many of the fossils for stratigraphic locality 392 (horton creek) were found in the silty dolomitic facies. however, in general, the formation is described as containing fossils (brachiopods in particular) in biomicrite, oosparite, silty dolomite or dolomitic limestone, and calcareous sandstone or arenaceous limestone.

Collection methods: This collection is a Carnegie Museum of Natural Hisory collection.

Primary reference: J. L. Carter. 1988. Early Mississippian Brachiopods from the Glen Park Formation of Illinois and Missouri. Bulletin of Carnegie Museum of Natural History (27)1-82 [A. Miller/D. Carlson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5695: authorized by Arnold Miller, entered by Donna Carlson on 15.11.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• Although molluscs are abundant at the type section of the formation and other macro invertebrates are very rare, only the brachiopod data are reported in this list.
Show authors, comments, and common names
unclassified
  -
Nigeroplica ? illinoisensis
Rhynchonellata
 Spiriferinida - Syringothyrididae
Syringothyris extenuata
 Orthida - Rhipidomellidae
Rhipidomella rockportensis
 Orthida - Schizophoriidae
Schizophoria hortonensis
 Spiriferida - Spiriferidae
Parallelora nupera
 Spiriferida - Ambocoeliidae
Crurithyris cf. levicula
 Spiriferida - Brachythyrididae
Brachythyris hortonensis
 Spiriferida - Martiniidae
Eomartiniopsis kinderhookensis
 Spiriferida - Elythidae
Kitakamithyris cooperensis
 Athyridida - Athyrididae
Composita matutina
 Rhynchonellida - Rhynchoporidae
Rhynchopora hamburgensis
 Rhynchonellida - Petasmariidae
Shumardella fracta
Strophomenata
 Strophomenida - Rugosochonetidae
Plicochonetes ? glenparkensis, Rugosochonetes cf. gregarius
 Productida - Monticuliferidae
Ovatia nascens