Mississippian Fossils, Illipah Formation, Northern Needle Range: Carboniferous - Chesterian, Utah
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Cliothyridina orbicularis
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Paleococrinus sp.
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Bivalvia
- Pholadomyida
- Edmondiidae
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Allorisma sp.
King 1844
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Strophomenata
- Productida
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Marginifera sp.
Waagen 1884
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Strophomenata
- Productida
- Linoproductidae
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Linoproductus ovatus
(Hall 1858)
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Strophomenata
- Productida
- Productellidae
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Dictyoclostus portlockianus
(Norwood and Pratten 1855)
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| recombined as Antiquatonia portlockianus | ||||||||||
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Dictyoclostus portlockianus
(Norwood and Pratten 1855)
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| recombined as Antiquatonia portlockianus | ||||||||||
| n. var. crassicostatus (Dunbar and Condra) | ||||||||||
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Strophomenata
- Productida
- Productidae
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Dictyoclostus burlingtonensis
(Hall 1858)
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Dictyoclostus inflatus
(McChesney 1860)
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Dictyoclostus americanus
Dunbar and Condra 1932
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| recombined as Reticulatia americana | ||||||||||
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Strophomenata
- Productida
- Echinoconchidae
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Diaphragmus elegans
(Norwood and Pratten 1855)
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| recombined as Echinoconchus elegans | ||||||||||
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Juresania nebraskensis
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Strophomenata
- Strophomenida
- Rugosochonetidae
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Chonetes granulifer
Owen 1852
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| recombined as Neochonetes granulifer | ||||||||||
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Strophomenata
- Orthotetida
- Derbyiidae
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Derbyia sp.
Waagen 1884
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Rhynchonellata
- Spiriferinida
- Punctospiriferidae
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Punctospirifer kentuckyensis
(Shumard 1855)
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| recombined as Punctospirifer kentuckensis | ||||||||||
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Rhynchonellata
- Orthida
- Rhipidomellidae
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Rhipidomella sp.
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Rhynchonellata
- Orthida
- Schizophoriidae
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Schizophoria sp.
King 1850
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Rhynchonellata
- Spiriferida
- Trigonotretidae
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Neospirifer triplicatus
(Hall 1852)
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| replaced by Neospirifer dunbari | ||||||||||
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Rhynchonellata
- Spiriferida
- Spiriferidae
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Spirifer occidentalis
Girty 1927
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| replaced by Anthracospirifer occiduus | ||||||||||
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Spirifer leidyi
Norwood and Pratten 1855
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| recombined as Anthracospirifer leidyi | ||||||||||
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Spirifer rockymountanus
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Rhynchonellata
- Athyridida
- Retziidae
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Eumetria acuticosta
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Rhynchonellata
- Athyridida
- Athyrididae
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Composita trilobata
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Composita ovata
Mather 1915
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Composita subtilita
(Hall 1852)
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Rhynchonellata
- Rhynchonellida
- Wellerellidae
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Wellerella (cf. Wellerella) osagensis
(Shumard and Swallow 1858)
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Rhynchonellata
- Rhynchonellida
- Petasmariidae
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Pugnoides sp.
Weller 1910
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Lingulata
- Lingulida
- Discinidae
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Orbiculoidea missouriensis
(Shumard 1858)
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Orbiculoidea capuliformis
(McChesney 1859)
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| original and current combination Discina capuliforma | ||||||||||
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Stenolaemata
- Cryptostomata
- Fenestellidae
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Archimedes sp.
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Stenolaemata
- Rhabdomesida
- Rhomboporidae
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Rhombopora sp.
Meek 1872
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Trilobita
- Proetida
- Phillipsiidae
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Phillipsia sp.
Portlock 1843
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Utah | County: | Millard |
| Coordinates: | 38.7° North, 114.0° West (view map) | ||||
| Paleocoordinates: | 1.9° South, 48.8° West | ||||
| Basis of coordinate: | estimated from map |
Time
| Period: | Carboniferous | ||
| *Period: | Middle Carboniferous | *Local age/stage: | Early/Lower Springeran - Late/Upper Chesterian |
| Key time interval: | Carboniferous - Chesterian | ||
| Age range of interval: | 358.90000 - 298.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Illipah | ||||
| Stratigraphy comments: The contact with the underlying Chainman Shale is places at the base of the red weathering limestones. The top of the brown crinoidal limestones, or whenever exposed, the top of the red-maroon sandstones form the contact with the overlying Pennsylvanian Ely Limestone |
Lithology and environment
| Primary lithology: | shelly/skeletal,black,red or brown,yellow sandy "limestone" |
| Lithology description: The writer has divided the formation into three units. The lower unit consists of thin bedded, black, sandy-limestone. The most outstanding feature of this formation, especially the lower unit, is the brick red and yellow ochre colors of the weathered limestones. Upward in the section, the limestones become medium bedded, form step ledges and slopes, and weather medium grey. The upper most unit consists of medium bedded crinoidal limestones which weather yellow-brown to brown. Throughout the upper unit partially silicified fossils are abundant and tend to weather free. Red and maron sandstones and quartzites are commonly exposed above the crinoidal limestones. The sands consist of quartz grains, sub-rounded to rounded, medium to coarse in size. | |
Taphonomy
Collection methods and comments
| Collection methods: | field collection |
Metadata
| Database number: | 13363 | ||
| Authorizer: | T. Olszewski | Enterer: | M. Gibson |
| Modifier: | M. Gibson | Research group: | marine invertebrate |
| Created: | 2002-03-10 08:15:37 | Last modified: | 2002-03-10 10:15:37 |
| Access level: | the public | Released: | 2002-03-10 08:15:37 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6006. | W. J. Gould. 1959. Geology of the Northern Needle Range Millard County, Utah. Brigham Young University Research Studies, Geology Series 6(5):1-47 [T. Olszewski/M. Gibson/L. Fall] |