UCMP D-5575, Confusion Range (Permian of the United States)

Where: Utah (39.4° N, 113.7° W: paleocoordinates 11.5° N, 36.0° W)

• coordinate stated in text

• small collection-level geographic resolution

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

• 650' (198 m) below top of Arcturus Formation

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, bioturbated, pebbly, shelly/skeletal limestone and lithified sandstone

• The enclosing rocks are composed of fine-grained mudstone or siltstone to coarse sandstone, and from wackestone to packstone. Occurrences on the west side of the seaway tend to be in limestones and sandstones and occasionaly in coarse pebble-bearing sediment, whereas occurrences on the east side of the seaway tend to be in finer-grained sediments with large clasts consisting entirely of shell material.

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 11963: authorized by Tom Olszewski, entered by Melissa Gibson on 22.09.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• Also included in the list is 1 encrusting bryozoan and 1 ostracod.
Show authors, comments, and common names
unclassified
  -
Lamellispira sp.
Strophomenata
 Productida - Aulostegidae
Costellarina sp.
Costellarina sp. Cooper and Muir-Wood 1967
Polychaeta
 Sabellida - Serpulidae
Spirorbis sp.
Spirorbis sp. Daudin 1800
Bivalvia
 Ostreida - Bakevelliidae
Bakevellia sp.
Bakevellia sp. King 1848 oyster
 Pectinida - Limipectinidae
Limipecten sp.
Limipecten sp. Girty 1903 scallop