UCMP D-837, Potter Ridge (Permian of the United States)

Where: Shasta County, California (40.7° N, 122.3° W: paleocoordinates 13.0° N, 43.3° W)

• coordinate stated in text

When: E Member (McCloud Formation), Sakmarian (293.5 - 290.1 Ma)

• Beds 25 feet (7.6 meters) above D-836. Fusulinid zone E.

Environment/lithology: marine; lithified limestone and lithified, cherty/siliceous limestone

• Clear, shallow, warm marine water with full access to the open sea.
• Lithologic information from stratigraphic section in Fig. 2. Thickness recorded for this section include sills of quartz diorite.

Size class: macrofossils

Reposited in the UCMP

Collection methods: peel or thin section,

• Fusulinids, cerioid and cerioid-astreoid rugose corals.

Primary reference: E. C. Wilson. 1982. Wolfcampian rugose and tabulate corals (Coelenterata: Anthozoa) from the Lower Permian McCloud Limestone of northern California. Contributions in Science, National History Museum of Los Angeles County 337:1-90 [T. Olszewski/L. Fall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 62678: authorized by Tom Olszewski, entered by Leigh Fall on 25.07.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Stauriida - Durhaminidae
"Arachnastraea fryi n. sp." = Pseudocystophora fryi
"Arachnastraea fryi n. sp." = Pseudocystophora fryi Wilson 1982 horn coral
 Stauriida - Petalaxidae
"Petalaxis kennedyi n. sp." = Petalaxis besti
"Petalaxis kennedyi n. sp." = Petalaxis besti Wilson 1982 horn coral