Locality 10, Logan River (Ordovician of the United States)

Where: Cache County, Utah (41.8° N, 111.6° W: paleocoordinates 8.4° S, 76.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Anomalorthis brachiopod zone, "Upper Cherty" Member (Garden City Formation), Whiterockian (470.0 - 457.3 Ma)

• Upper 150 feet of formation. Was Canadian, but almost certainly Kanoshian.

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, fine-grained, cherty/siliceous limestone

• "Aphanitic, irregularly laminated, cherty limestone."

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 103908: authorized by Melanie Hopkins, entered by Melanie Hopkins on 03.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Orthida - Anomalorthidae
Anomalorthis sp.
Anomalorthis sp. Ulrich and Cooper 1936
 Orthida - Orthidae
Orthis cf. subalata
Orthis cf. subalata Ulrich and Cooper 1938
 Orthida - Hesperonomiidae
Hesperonomia sp.
Hesperonomia sp. Ulrich and Cooper 1936
 Pentamerida - Tetralobulidae
Syntrophopsis transversa
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia sp.
Tritoechia sp. Ulrich and Cooper 1936
 Parablastoidea - Blastocystidae
Blastoidocrinus cf. carchariaedens