Section 1/Locality 11222: Norian, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Anthozoa
|
||||||||||
|
Anthozoa indet.
Ehrenberg 1834
|
1 specimen | |||||||||
| originally entered as "Anthozoa (colonial) sp."; changed by JA 30.6.04 | ||||||||||
|
Rhynchonellata
- Terebratulida
- Zeilleriidae
|
||||||||||
|
Zeilleria cf. elliptica
(Zugmayer 1882)
|
1 specimen | |||||||||
|
Rhynchonellata
- Terebratulida
- Plectoconchidae
|
||||||||||
|
Plectoconcha aequiplicata
(Gabb 1864)
|
105 specimens | |||||||||
|
Bivalvia
|
||||||||||
|
Bivalvia indet.
Linnaeus 1758
|
11 specimens | |||||||||
|
Bivalvia
- Ostreida
- Pteriidae
|
||||||||||
|
Arcavicula sp.
Cox 1964
|
1 specimen | |||||||||
|
Gastropoda
|
||||||||||
|
Gastropoda informal a
|
4 specimens | |||||||||
| "Snail a" | ||||||||||
|
Gastropoda informal t
|
6 specimens | |||||||||
| "Snail t" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Nye |
| Coordinates: | 38.9° North, 117.6° West (view map) | ||||
| Paleocoordinates: | 15.7° North, 53.8° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Triassic | Epoch: | Late/Upper Triassic |
| Stage: | Norian | 10 m.y. bin: | Triassic 4 |
| *Period: | Late/Upper Triassic | ||
| *International age/stage: | Late/Upper Carnian - Early/Lower Norian | ||
| Key time interval: | Norian | ||
| Age range of interval: | 227.00000 - 208.50000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Luning | ||||
| Local section: | Section 1 | Local bed: | 11222 | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: The Luning Formation is a remnant of a tectonically dismembered Lower Mesozoic carbonate platform complex exposed in scattered ranges throughout west-central Nevada. It rests unconformably upon different, often unamed, Late Paleozoic and Triassic units in each outcrop, but is regoinally overlain by the Upper Triassic through Lower Jurassic Gabbs and Sunrise Formations. | |||||
Lithology and environment
| Primary lithology: | lithified silty lime mudstone |
| Secondary lithology: | lithified silty wackestone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: The lowest, clastic member consists of 250m of chert pebble conglomerates, silty sandstones, and argillites. Except for rare fragments of petrified wood, these sediments are without fossils. The shaly limestone and calcareous shale members, each 200m thick, overlie the clastic unit. These are formed of interbedded silty and shaly limestones, limey shales, mudstones, and claystones, and contain a rich fossil component. The upper most carbonate member is a 400m thick sequence of comparatively silt- and clay-free limestones and secondary dolomites. This unit is also characterized by an abundance of fossils. The upper, fossi-bearing members of the Luning Formation are the focus of this report. | |
| Environment: | basinal (carbonate) |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Collection size: | 129 specimens |
| Reason for describing collection: | paleoecologic analysis |
| Museum repositories: | UCMP |
Metadata
| Database number: | 32597 | ||
| Authorizer: | D. Bottjer | Enterer: | N. Bonuso |
| Modifier: | N. Bonuso | Research group: | marine invertebrate |
| Created: | 2003-07-09 14:23:33 | Last modified: | 2004-08-19 12:32:37 |
| Access level: | the public | Released: | 2003-07-09 14:23:33 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 8769. | J. A. Hogler. 1992. Community structure, paleoecology, and depositional environments within the Upper Triassic Luning Formation of Nevada. [D. Bottjer/N. Bonuso/N. Bonuso] |