Marjun Formation, Section 17, Millard County, Utah - Rigby 1997: Menevian, Utah
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Demospongiae
- Protomonaxonida
- Hazeliidae
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Hazelia palmata
Walcott 1920
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1 individual | ||||||
see common names |
Geography
Country: | United States | State/province: | Utah | County: | Millard |
Coordinates: | 39.1° North, 113.1° West (view map) | ||||
Paleocoordinates: | 4.5° South, 92.0° West | ||||
Geographic resolution: | outcrop |
Time
Period: | Cambrian | Epoch: | Middle Cambrian |
10 m.y. bin: | Cambrian 3 | ||
*Period: | Middle Cambrian | *Epoch: | Middle St. David's | *Local age/stage: | Middle Menevian |
Key time interval: | Menevian | Zone: | Ptychagnostus punctuosus |
Age range of interval: | 513.00000 - 501.00000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Marjum Limestone | ||||
Local section: | Section 17, Marjum Formation, Millard County, Utah | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: White Hill Quarry, which is 25 meters east of the sponge locality is at the same stratigraphic level as the Marjum Formation. The stratigraphy of the Marjum Formation is similar to Silurian "smothered-bottom assmeblages" described by Brett (1983). |
Lithology and environment
Primary lithology: | lithified "shale" |
Secondary lithology: | "limestone" |
Lithology description: the sponge is interbedded BETWEEN shale and limestone, 185-200 meters above the base of the marjum formation. | |
Environment: | submarine fan |
Geology comments: The tectonic setting is listed as as "deep basinal". |
Taphonomy
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | field collection |
Collection size: | 1 specimens |
Reason for describing collection: | biostratigraphic analysis |
Collection method comments: The sponge specimen is preserved as an oval impression. | |
Taxonomic list comments:The taxonomic list does not include arthropods, carpoid echinoderms, edrioasteroids, hyolithids, brachiopods, sponges, and algaes found in the stratigraphy but not on the specimen slab. |
Metadata
Database number: | 7909 | ||
Authorizer: | M. Patzkowsky | Enterer: | P. Borkow | Research group: | marine invertebrate |
Created: | 2000-06-07 15:01:10 | Last modified: | 2001-08-30 17:52:51 |
Access level: | the public | Released: | 2001-03-26 12:03:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
515. | J. K. Rigby, L. F. Gunther, and F. Gunther. 1997. The first occurrence of the Burgess Shale demosponge Hazelia palmata Walcott, 1920, in the Cambrian of Utah. Journal of Paleontology 71(6):994-997 [M. Patzkowsky/P. Borkow/P. Novack-Gottshall] |