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
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Clelandia utahensis
Ross 1951
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Trilobita
- Asaphida
- Nileidae
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Symphysurina informal sp. A
Ulrich 1924
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= Symphysurina illaenoides
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Fortey 1983 | ||||||
Trilobita
- Asaphida
- Asaphidae
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Bellefontia acuminiferentis
Ross 1951
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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] |