UCMP D-5621, High Bald Peaks, Medicine Range (Permian of the United States)

Where: Nevada (40.2° N, 115.2° W)

• Paleocoordinates: 11.8° N, 36.8° W (Wright 2013)

• coordinate stated in text

• small collection-level geographic resolution

When: Pequop Formation, Artinskian (290.1 - 279.3 Ma)

• 300' (92 m) below top of Pequop Formation

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified wackestone and lithified packstone

• The enclosing rock consists of wackestone and packstone that was a sediment of mud or muddy sand, containing a small to moderate amount of clay and noncalcareous silt. The beds are separated by thin, clayey shale partings and are interbedded with noncarbonate strata. The coarse component consists of shell material that is broken, abraded, and sometimes well-rounded.

Size class: macrofossils

Collected by T. Yancey, L. Plas, M. Kaasa; reposited in the UCMP

Primary reference: T. E. Yancey and C.H. Stevens. 1981. Early Permian fossil communities in northeastern Nevada and northwestern Utah. In J.Gray, A.J. Boucot, and W.B.N. Berry (eds.), Communitites of the Past 243-269 [T. Olszewski/M. Gibson/S. Bruning]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 10653: authorized by Tom Olszewski, entered by Melissa Gibson on 08.06.2001, edited by Pete Wagner

Creative Commons license: CC0 (CC0)

Taxonomic list

• Also included in the list are: 25 ramose bryozoan forms and fenestellid bryozoan forms.
Show authors, comments, and common names
Trilobita
 Proetida - Phillipsiidae
Anisopyge sp.
Anisopyge sp. Girty 1909 trilobite
Sedentaria
 Sabellida - Serpulidae
Spirorbis sp.
Spirorbis sp. Daudin 1800
Scaphopoda
 Dentaliida - Prodentaliidae
Prodentalium sp.
Prodentalium sp. Young 1942 tusk shell
Gastropoda
 Euomphalina - Euomphalidae
Amphiscapha sp.
Amphiscapha sp. Knight 1942 snail
 Bellerophontida -
Bellerophontoidea indet.
Bellerophontoidea indet. M'Coy 1851 snail
 Caenogastropoda - Meekospiridae
Meekospira sp.
Meekospira sp. Ulrich and Scofield 1897 snail
 Caenogastropoda - Goniasmatidae
Goniasma sp.
Goniasma sp. Tomlin 1930 snail
Bivalvia
 Nuculida - Nuculidae
Nuculavus sp.
Nuculavus sp. Tschernyschev 1943 nut clam
 Ostreida - Bakevelliidae
Bakevellia sp.
Bakevellia sp. King 1848 oyster
 Pectinida - Limipectinidae
Acanthopecten sp., Limipecten sp.
Acanthopecten sp. Girty 1903 scallop
Limipecten sp. Girty 1903 scallop
 Pectinida - Streblochondriidae
Streblochondria sp.
Streblochondria sp. Newell 1938 scallop
 Pectinida - Pseudomonotidae
Pseudomonotis sp.
Pseudomonotis sp. von Beyrich 1862 scallop
 Carditida - Astartidae
Astartella sp.
Astartella sp. Hall 1858 clam
 Cardiida - Kalenteridae
Permophorus sp.
Permophorus sp. Chavan 1954 clam
Rhynchonellata
 Athyridida - Athyrididae
Composita sp.
Composita sp. Brown 1849