Lower part of the Phi Kappa Formation, Trail Creek section, collection 69ICt 86 (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 145240: 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 - Retiolitidae
Glyptograptus cf. sp.
Glyptograptus cf. sp. Lapworth 1873 graptolite
common
 Graptoloidea - Climacograptidae
Climacograptus riddellensis, "Climacograptus bicornis" = Climacograptus (Climacograptus) bicornis
Climacograptus riddellensis climacograptid
frequent
"Climacograptus bicornis" = Climacograptus (Climacograptus) bicornis Hall 1847 climacograptid
frequent
 Graptoloidea - Diplograptidae
Orthograptus aff. calcaratus, Orthograptus whitfieldi, Orthograptus pageanus, "Orthograptus amplexicaulis" = Rectograptus amplexicaulis, Diplograptus sp.
Orthograptus whitfieldi graptolite
rare
Orthograptus pageanus Elles and Wood 1907 graptolite
spp. pageanus; frequent
"Orthograptus amplexicaulis" = Rectograptus amplexicaulis Hall 1847 graptolite
rare
Diplograptus sp. graptolite
rare
 Graptoloidea - Dicranograptidae
Dicranograptus cf. kirki, Dicranograptus spinifer
Dicranograptus cf. kirki graptolite
rare
Dicranograptus spinifer graptolite
rare
 Graptoloidea - Glossograptidae
Cryptograptus tricornis
Cryptograptus tricornis Carruthers 1859 graptolite
rare