Westgate Ridge Section, Horizon 48: Early Toarcian, Nevada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Dactylioceratidae
see common names

Geography
Country:United States State/province:Nevada County:Churchill
Coordinates: 39.3° North, 118.1° West (view map)
Paleocoordinates:23.6° North, 43.8° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Jurassic Epoch: Early Jurassic
Stage: Toarcian 10 m.y. bin: Jurassic 3
Key time interval: Early Toarcian Ammonoid zone:  Kanense
Age range of interval: 184.2 - 182.9 m.y. ago
Stratigraphy
Formation:Sunrise Member:Mina Peak
Local section:Westgate Ridge Section Local bed:48
Local order:bottom to top
Lithology and environment
Primary lithology: lithified sandy "limestone"
Secondary lithology: lithified "shale"
Includes fossils?Y
Environment:shallow subtidal indet. Tectonic setting:back-arc basin
Taphonomy
Modes of preservation:cast,mold/impression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ)
Reason for describing collection:taxonomic analysis
Collection method comments: University of Montana Paleontology Center (UMPC) collection
Metadata
Database number:208066
Authorizer:J. Pálfy Enterer:D. Juhász
Modifier:D. Juhász Research group:marine invertebrate
Created:2020-03-18 06:05:14 Last modified:2025-02-22 15:12:02
Access level:group members Released:2022-03-18 06:05:14
Creative Commons license:CC0
Reference information

Primary reference:
67855. A. H. Caruthers, P. L. Smith, D. Gröcke, B. C. Gill, T. R. Them and J. P. Trabucho-Alexandre. 2018. Pliensbachian–Toarcian (Early Jurassic) Ammonoids from the Luning Embayment, West-Central Nevada, U.S.A. Bulletins of American Paleontology 393:1-84 [J. Pálfy/Z. Kostka]