Locality 5, Hillyard's Canyon, Zone "A" (Ordovician of the United States)

Where: Franklin County, Idaho (42.1° N, 111.6° W: paleocoordinates 7.3° S, 81.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Symphysurina bulbosa trilobite zone, Garden City Formation, Gasconadian (485.4 - 477.7 Ma)

• 3 foot interval at 36 feet above base of formation. Zone A.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, fine-grained limestone and lithified, pebbly mudstone

• "Finely crystalline limestone with scattered mudstone pebbles"

Size class: macrofossils

Collected by R. J. Ross, Jr. in 1946-1947; reposited in the YPM

Primary reference: R. J., J.r. Ross. 1951. Stratigraphy of the Garden City Formation in northeastern Utah, and its trilobite faunas. Yale Peabody Museum of Natural History Bulletin 6:1-161 [S. Finnegan/S. Finnegan/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 103814: authorized by Melanie Hopkins, entered by Melanie Hopkins on 02.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Orthida - Plectorthidae
? Nanorthis sp.
? Nanorthis sp. Ulrich and Cooper 1936
Trilobita
 Proetida - Dimeropygidae
Pseudohystricurus rotundus n. sp.
Pseudohystricurus rotundus n. sp. Ross 1951 trilobite
 Proetida - Hystricuridae
Hystricurus "sp. D"
Hystricurus "sp. D" Raymond 1913 trilobite
 Asaphida - Nileidae
Symphysurina illaenoides