Lower part of the Phi Kappa Formation, Trail Creek section, collection 69ICt 87 (Ordovician of the United States)

Where: Idaho (43.9° N, 114.2° W: paleocoordinates 5.8° S, 73.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Climacograptus bicornis graptolite zone, Phi Kappa Formation, Gisbornian (458.4 - 452.7 Ma)

• Lower Caradocian

Environment/lithology: deep subtidal; quartzite and shale

• Massive quartzite that has several thin interbeds of shale very rich in graptolites. The Phi Kappa appears to be thicker in the lower plate of the Park Creek thrust than in the upper plate and has conspicuous quartzite that is characterized by distinctive banding.

Size classes: macrofossils, mesofossils

Primary reference: C. Carter and M. Churkin. 1977. Ordovician and Silurian graptolite succession in the Trail Creek area, central Idaho-a graptolite zone reference section. Geological Survey Professional Paper [W. Kiessling/M. Krause]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 145239: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 30.05.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Climacograptidae
Pseudoclimacograptus scharenbergi
Pseudoclimacograptus scharenbergi Lapworth 1976 climacograptid
common
 Graptoloidea - Diplograptidae
Orthograptus calcaratus
Orthograptus calcaratus graptolite
common
 Graptoloidea - Dicranograptidae
Dicranograptus nicholsoni
Dicranograptus nicholsoni Hopkinson 1870 graptolite
rare
 Graptoloidea - Glossograptidae
Cryptograptus tricornis
Cryptograptus tricornis Carruthers 1859 graptolite
abundant specimens