Megafauna of Surrett Canyon Fm. (Chesterian); Idaho: Section C-Christian Gulch (Carboniferous of the United States)

Where: Custer County, Idaho (44.4° N, 113.9° W: paleocoordinates 4.2° N, 41.4° W)

• outcrop-level geographic resolution

When: Surrett Canyon Formation, Chesterian (335.5 - 323.2 Ma)

• The Surrett Canyon is underlain by the South Creek Fm. and overlain gradationaly by the Arco Hills Fm.

Environment/lithology: intraclastic, peloidal, shelly/skeletal, argillaceous, silty, cherty/siliceous wackestone and intraclastic, peloidal, shelly/skeletal, argillaceous packstone

• The lower portion of the section is 54m thick and is dominated by skeletal wackestones and pelletoidal-foraminiferal wackestones. Minor lithologies include thin skeletal-pelletoidal packsotnes and fossiliferous mudstones. Breccia occurs in unit 10. The overlying segment is approx. 16m thick. It is distinguished by argillaceous bioclastic-intraclastic wacke/packstone separated by a sparse skeletal wackestone. This segment is capped by a thick skeletal-pelletoidal packstone. Units 18-52 of the section represent a combined thickness of 144m. THe rock types are dominted by thick sequences of whole fossil skeletal wackestones and packstones. The rocks are periodically separted by argillaceous bioclastic-intraclstic wacke/packstones. Also present is the distinct silty quartzose mud/wackestone used for correlation. The segment is capped by a whole fossil bryozoan-coral packstone. The remaining 44m of the section is dominated by argillaceous bioclastic wacke/packstone, silty quartzose mud/wackestone, and skeletal pelletoidal wackestones. Concentrations of nodular and lenticular chert occur in units 45 & 57.

Primary reference: T. J. Galvin. 1981. Stratigraphy, Faunal Assemblages, and Depositional Environments of the Surrett Canyon Formation (Chesterian), Lost River Range, South-Central Idaho. Thesis, University of Idaho [T. Olszewski/M. Gibson]more details

PaleoDB collection 13086: authorized by Tom Olszewski, entered by Melissa Gibson on 20.01.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Also included are indet. syringoporids Coelenterata, indet. bifoliate bryozoans, indet. spiriferid and productid brachiopods, and indet. crinoid and echinoid fragments.
Show authors, comments, and common names
Anthozoa
 Stauriida - Petalaxidae
Lithostrotionella sp.
Lithostrotionella sp. Yabe and Hayasaka 1915 horn coral
 Stauriida - Lithostrotionidae
Lithostrotion sp.
Lithostrotion sp. Fleming 1828 horn coral
 Stauriida - Cyathopsidae
Caninia sp.
Caninia sp. Michelin 1840 horn coral
Stenolaemata
 Cystoporata - Fistuliporidae
Fistulipora sp.
Fistulipora sp. McCoy 1850
 Cystoporida - Sulcoreteporidae
Sulcoretepora sp.
 Trepostomida - Stenoporidae
Tabulipora sp.
 Rhabdomesida - Rhomboporidae
Rhombopora sp.
Rhombopora sp. Meek 1872
 Cryptostomata - Fenestellidae
Fenestella sp.
Fenestella sp. Lonsdale 1839
 Cryptostomata - Acanthocladiidae
Polypora sp.
Lingulata
 Lingulida - Discinidae
Orbiculoidea sp.
Orbiculoidea sp. d'Orbigny 1847
Rhynchonellata
 Spiriferinida - Punctospiriferidae
Punctospirifer sp.
Punctospirifer sp. North 1920
 Athyridida - Retziidae
Eumetria sp.
 Athyridida - Athyrididae
Cleiothyridina sp., Composita sp.
Cleiothyridina sp. Buckman 1906
Composita sp. Brown 1849
 Spiriferida - Spiriferidae
Anthracospirifer sp.
 Orthida - Schizophoriidae
Schizophoria sp.
Schizophoria sp. King 1850
Strophomenata
 Orthotetida - Schuchertellidae
Schuchertella sp.
Schuchertella sp. Girty 1904
 Productida - Productellidae
Antiquatonia sp.
Antiquatonia sp. Miloradovich 1945
 Productida - Echinoconchidae
Echinoconchus sp.