Northern Montezuma Range, Campito Fm., Nevadella zone, section MN-f 181: Montezuman, Nevada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Redlichiida - Holmiidae
Montezumaspis parallela (Fritz 1995)
original and current combination Palmettaspis parallela
Montezumaspis cometes (Fritz 1995)
see common names

Geography
Country:United States State/province:Nevada County:Esmeralda
Coordinates: 37.7° North, 117.3° West (view map)
Paleocoordinates:3.5° South, 96.9° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Cambrian Epoch:Series 2
Stage:Stage 3 10 m.y. bin:Cambrian 2
Key time interval:Montezuman Zone: Nevadella
Age range of interval:519.90000 - 514.80000 m.y. ago
Stratigraphy
Formation:Campito Member:Montenegro
Local section:MN-f Local bed:181
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: At the base of the middle Montezuman Stage.
Lithology and environment
Primary lithology: siltstone
Secondary lithology: sandstone
Lithology description: gray shaly siltstone with occasional lenses of fine sandstone
Environment:deep subtidal indet.
Geology comments: Montenegro Member is 349 m thick. The lower 144 m is light brown sericitic siltstone and fine sandstone. The next 21 m interval contains silstone with quartzite and sandstone beds, and lenses of bioclastic carbonate packstone and glauconitic arenaceous limestone. The upper 184 m is greenish gray shaly siltstone with occasional lenses of fine sandstone. Near the top of the member there are thin beds of sandstone and bioclastic limestone
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:140502
Authorizer:W. Kiessling Enterer:M. Krause
Modifier:M. Krause Research group:marine invertebrate
Created:2013-03-11 20:14:24 Last modified:2013-03-13 05:18:32
Access level:authorizer only Released:2013-06-11 20:14:24
Creative Commons license:CC BY
Reference information

Primary reference:
45528. J. S. Hollingsworth. 2006. Holmiidae (Trilobita: Olenellina) of the Montezuman Stage (Early Cambrian) in Western Nevada. Journal of Paleontology 80(2):309-332 [W. Kiessling/M. Krause]