Horseshoe Gulch USNM 18138c (Ordovician of the United States)

Where: California (41.4° N, 122.8° W)

• Paleocoordinates: 3.6° S, 132.4° W (Wright 2013)

When: 5 Member (Horseshoe Gulch Formation), Ashgill (449.5 - 443.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lithified packstone and lithified wackestone

• "These lenses have maximum exposed thicknesses of about 50 m, range from bedded to massive, and are commonly skeletal-grain ... lime wackestone-packstone."

Size class: macrofossils

Preservation: replaced with silica

Reposited in the BMNH, USNM

Primary reference: A. W. Potter. 1990. Middle and Late Ordovician brachiopods from the eastern Klamath Mountains, northern California. Palaeontographica Abteilung A 212(1-6):31-158 [A. Miller/S. Kolbe]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 100635: authorized by Arnold Miller, entered by Sarah Kolbe on 11.12.2010

Creative Commons license: CC0 (CC0)

Taxonomic list

• Only sponges are described in this reference.
Show authors, comments, and common names
Rhynchonellata
 Orthida - Dicoelosiidae
Epitomyonia relicina
 Orthida - Hesperorthidae
Ptychopleurella aff. uniplicata, Hesperorthis aff. evenkiensis
 Orthida - Plaesiomyidae
Austinella aff. kankakensis
 Orthida - Wangyuiidae
Sigmelasma "sp. 1"
Sigmelasma "sp. 1" Potter 1990
Strophomenata
 Strophomenida - Hesperomenidae
Anoptambonites myriomorpheus