Hidden Canyon, USGS 22228-PC (Carboniferous of the United States)

Also known as Hidden Canyon, Middle Cliff, 147 feet above base of formation

Where: Arizona (36.5° N, 113.6° W: paleocoordinates 1.7° N, 43.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Watahomigi Formation (Supai Group), Morrowan (323.2 - 318.6 Ma)

• The Watahomigi is comprised of three informal units: a lower slope unit, a middle cliff unit, and an upper slope unit.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, coarse, dolomitic, gray, cherty/siliceous limestone

• Limestone, dolomitic, and limestone, light brownish-gray with pale-reddish-brown aphantic with scattered coarse grains, medium-bedded (2-4 ft); contains jasper and chert nodules in irregular bands throughout; abundant jasper beds and lenses near top; weathers to rough, light-gray surface; forms resistant ledges. The unit is 102.0 feet thick.

Size class: macrofossils

Reposited in the USGS

• USGS 22228-PC

Primary reference: E. D. McKee. 1982. The Supai Group of the Grand Canyon. United States Geological Survey Professional Paper 1173 [J. Alroy/C. Simpson/C. Simpson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 42659: authorized by John Alroy, entered by Carl Simpson on 03.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam
 Trigoniida - Schizodidae
Schizodus sp.
Schizodus sp. King 1844 clam
 Pectinida - Aviculopectinidae
Aviculopecten gravidus
Rhynchonellata
 Athyridida - Athyrididae
Composita subtilia
Strophomenata
 Productida - Linoproductidae
Linoproductus sp.
 Productida - Productidae
Flexaria sp.