Lower part of the Phi Kappa Formation, Trail Creek section, collection 69ICt 88 (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 145238: 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 - Lasiograptidae
Lasiograptus harknessi
Lasiograptus harknessi lasiograptid
rare
 Graptoloidea - Climacograptidae
"Climacograptus bicornis" = Climacograptus (Climacograptus) bicornis
"Climacograptus bicornis" = Climacograptus (Climacograptus) bicornis Hall 1847 climacograptid
rare
 Graptoloidea - Diplograptidae
Corynoides calicularis, Orthograptus calcaratus, "Orthograptus amplexicaulis" = Rectograptus amplexicaulis, Amplexograptus perexcavatus
Corynoides calicularis Nicholson 1867 graptolite
frequent
Orthograptus calcaratus graptolite
common
"Orthograptus amplexicaulis" = Rectograptus amplexicaulis Hall 1847 graptolite
rare
Amplexograptus perexcavatus graptolite
rare
 Graptoloidea - Dicranograptidae
Dicellograptus divaricatus, Dicranograptus contortus, Dicranograptus nicholsoni
Dicellograptus divaricatus Hall 1859 graptolite
rare
Dicranograptus contortus graptolite
rare
Dicranograptus nicholsoni Hopkinson 1870 graptolite
abundant specimens
 Graptoloidea - Glossograptidae
Cryptograptus tricornis, Glossograptus hincksii
Cryptograptus tricornis Carruthers 1859 graptolite
common
Glossograptus hincksii Hopkinson 1872 graptolite
rare