Locality 5, Hillyard's Canyon, Zone "G(2)a", lower: Tulean, Idaho
collected by R. J. Ross, Jr. 1946-1947

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Proetida - Bathyuridae
Macropyge gladiator Ross 1951
? Licnocephala sp. Ross 1951
Licnocephala bicornuta Ross 1951
Trilobita - Asaphida - Asaphidae
? Niobe sp. Angelin 1851
Trilobita - Asaphida - Remopleurididae
Scinocephalus solitecti Ross 1951
Trilobita - Corynexochida - Illaenuridae
? Platycolpus sp. Raymond 1913
see common names

Geography
Country:United States State/province:Idaho County:Franklin
Coordinates: 42.1° North, 111.6° West (view map)
Paleocoordinates:7.5° South, 80.8° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Ordovician Epoch: Early Ordovician
10 m.y. bin: Ordovician 1-2
Key time interval: Tulean Trilobite zone:  Protopliomerella contracta
Age range of interval: 480.3 - 473.9 m.y. ago
Stratigraphy
Formation:Garden City
Stratigraphic resolution:group of beds
Stratigraphy comments: 61 foot interval beginning 497 feet above base of formation. Lower collection from biozone "G(2)a" at this locality.
Lithology and environment
Primary lithology: lithified muddy "limestone"
Secondary lithology: lithified conglomerate
Lithology description: "Interbedded, irregularly laminated muddy limestone, coarse intraformational conglomerate, and slabby aphanitic limestone, of which the first forms that thickest layers."
Environment:shallow subtidal indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Museum repositories:YPM
Collectors:R. J. Ross, Jr. Collection dates:1946-1947
Taxonomic list comments:In the description of the measured section Ross states that this collection contains a "complete trilobite assemblage of Zone "G(2)a" (p. 15). Taxonomic list compiled from summary of faunal zones on p. 28.
Metadata
Database number:103805
Authorizer:M. Hopkins Enterer:M. Hopkins
Modifier:P. Wagner Research group:marine invertebrate
Created:2011-02-02 09:22:30 Last modified:2012-08-25 20:18:53
Access level:the public Released:2011-02-02 09:22:30
Creative Commons license:CC BY
Reference information

Primary reference:

25414. 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]