Pigeon Wash, USGS 27026-PC (Carboniferous of the United States)

Also known as Conglomerate bed 60 ft above base of formation.

Where: Arizona (36.3° N, 113.8° W: paleocoordinates 1.7° N, 43.8° W)

• 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, conglomeratic limestone

• Conglomerate, pink to gray; composed of clastic limestone, which is pebbly near the base but conglomeratic above; contains scattered brachiopods; forms resistant ledge. Matrix: limestone, reddish-brown, very granular. Gravel: includes pebbles and granules of light-gray, aphantic limestone, deep-reddish-brown mudstone, dark-gray limestone, and pale-reddish-brown siltstone; maximum size 2 in.; avverage size 0.25-0.5 in.; mostly rounded, some subangular.

Size class: macrofossils

Reposited in the USGS

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 42665: 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
Strophomenata
 Orthotetida - Derbyiidae
Derbyia sp.
Derbyia sp. Waagen 1884
Rhynchonellata
 Athyridida - Athyrididae
Composita ovata
Composita ovata Mather 1915