Locality 1, Swan Peak and Garden City Canyon, Zone "A-B": Gasconadian, Utah
collected by R. J. Ross, Jr. 1946-1947

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Ptychopariida - Kingstoniidae
Clelandia utahensis Ross 1951
Trilobita - Asaphida - Nileidae
Symphysurina informal sp. A Ulrich 1924
    = Symphysurina illaenoides
Fortey 1983
Trilobita - Asaphida - Asaphidae
Bellefontia acuminiferentis Ross 1951
see common names

Geography
Country:United States State/province:Utah County:Rich
Coordinates: 42.0° North, 111.5° West (view map)
Paleocoordinates:7.5° South, 81.9° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Early/Lower Ordovician
Stage:Tremadocian 10 m.y. bin:Ordovician 1
Key time interval:Gasconadian Trilobite zone: Symphysurina bulbosa
Age range of interval:485.40000 - 477.70000 m.y. ago
Stratigraphy
Formation:Garden City
Stratigraphic resolution:group of beds
Stratigraphy comments: 16 foot interval starting at 37 feet above base of measured section. Zones A-B is Symphysurina bulbosa in modern usage.
Lithology and environment
Primary lithology:gray lithified "limestone"
Secondary lithology:yellow lithified muddy "limestone"
Lithology description: "Resistant, aphanitic, dark gray, laminar limestone in 2-4 foot beds, with thin interlayers of muddy, buff-weathered limestone and some thin lenses of intraformational conglomerate."
Environment:shallow subtidal indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:YPM
Collectors:R. J. Ross, Jr. Collection dates:1946-1947
Metadata
Database number:103786
Authorizer:M. Hopkins Enterer:M. Hopkins
Modifier:P. Wagner Research group:marine invertebrate
Created:2011-02-02 05:23:11 Last modified:2012-08-25 15:06:51
Access level:the public Released:2011-02-02 05:23:11
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]

Secondary references:

35444 R. A. Fortey. 1983. Cambrian-Ordovican trilobites from the boundary beds in western Newfoundland and their phylogenetic significance. in D. E. G. Briggs and P. D. Lane, eds, Trilobites and other Early Arthropods, Special Papers in Palaeontology 30 179-211 [M. Hopkins/M. Hopkins]