Upper oolite mbr, Pilgrim Fm. (Cambrian of the United States)

Where: Wyoming-Montana (44.7° N, 111.1° W: paleocoordinates 6.6° S, 82.6° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Crepicephalus zone, Pilgrim Formation, Dresbachian (497.0 - 485.4 Ma)

• "Crepicephalus zone. Dresbachian"

• member-level stratigraphic resolution

Environment/lithology: sand shoal; ooidal carbonate

• "oolite and assoc carbonates, offshore oolite shoal, BA3, cratonic"

Size class: macrofossils

Primary reference: R. M. Bonem. 1972. Stratigraphic and faunal studies of the Pilgrim Formation in south-central Montana. Montana Geological Society Guidebook 11-17 [M. Uhen/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 233: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "R.M. Bonem, 1972. Strat and faunal studies of the Pilgrim Fm. in south-central Montana. Mont. Geol. Soc. Guidebook p.11-17" [trilobites, one hyolith]
 Ptychopariida - Kingstoniidae
Blountia sp. Walcott 1916 trilobite
Kingstonia sp. Walcott 1924 trilobite
 Ptychopariida - Tricrepicephalidae
Tricrepicephalus sp. Kobayashi 1935 trilobite
 Ptychopariida - Crepicephalidae
Coosina sp. Rasetti 1956 trilobite
Uncaspis sp. Kobayashi 1935 trilobite
Coosia sp. Walcott 1911 trilobite
 Asaphida - Asaphidae
Maryvillia sp. Walcott 1916 trilobite
 Hyolithida - Hyolithidae
Hyolithes sp. d'Eichwald 1840