USGS loc. D1024 CO, Mazourka Canyon, Inyo Mountains: Stairsian - Blackhillsian, California
collected by J. Ross, Jr.

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Asaphida
Asaphida indet. Salter 1864
"Asaphid"
Trilobita - Asaphida - Asaphidae
? Trigonocerca sp. Ross 1951
large
see common names

Geography
Country:United States State/province:California County:Inyo
Coordinates: 36.9° North, 118.1° West (view map)
Paleocoordinates:3.7° South, 89.2° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Ordovician Epoch:Early/Lower Ordovician
Key time interval:Stairsian - Blackhillsian
Age range of interval:485.40000 - 471.80000 m.y. ago
Stratigraphy
Formation:Al Rose
Local section:Northern Inyo Mountains, CA Local bed:430 ft
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Ibexian
Lithology and environment
Primary lithology: lithified "shale"
Lithology description: brown; sandy; interbedded w/ thin grey Ls beds
Environment:offshore shelf Tectonic setting:passive margin
Geology comments: outer shelf
Taphonomy
Modes of preservation:body,replaced with silica
Size of fossils:macrofossils
Collection methods and comments
Collection methods:bulk,field collection
Reason for describing collection:biostratigraphic analysis
Collectors:J. Ross, Jr.
Metadata
Also known as:SF 3
Database number:104271
Authorizer:S. Finnegan Enterer:S. Finnegan
Modifier:J. Marcot Research group:marine invertebrate
Created:2011-02-07 12:04:21 Last modified:2023-09-09 15:07:54
Access level:the public Released:2011-02-07 12:04:21
Creative Commons license:CC BY
Reference information

Primary reference:

25410. R. J. Ross, Jr. and C. R. Longwell. 1964. Middle and Lower Ordovician Formations in Southernmost Nevada and Adjacent California. United States Geological Survey Bulletin 1180-C:C1-C101 [S. Finnegan/S. Finnegan/J. Marcot]