Harding Formation Trilobites: Caradoc, Colorado

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Phacopida - Pterygometopidae
Isalaux canyonensis n. gen., n. sp. Frederickson and Pollack 1952
Bivalvia - Solemyida - Ctenodontidae
Ctenodonta sp. Salter 1852
Bivalvia - Cyrtodontida - Cyrtodontidae
Vanuxemia rotundata
Gastropoda - Euomphalina - Holopeidae
Eccyliomphalus contiguus Ulrich and Scofield 1897
Cephalopoda - Orthocerida - Kionoceratidae
Kionoceras sp. Hyatt 1884
Cephalopoda - Actinocerida - Ormoceratidae
Ormoceras sp. Stokes 1840
see common names

Geography
Country:United States State/province:Colorado County:Fremont
Coordinates: 38.0° North, 105.0° West (view map)
Paleocoordinates:14.9° South, 74.0° West
Geographic resolution:local area
Time
Period: Ordovician Epoch: Late Ordovician
10 m.y. bin: Ordovician 4-5
*Period:Late/Upper Ordovician *Epoch:Early/Lower Caradoc
Key time interval: Caradoc
Age range of interval: 458.4 - 449.6 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Harding
Stratigraphic resolution:formation
Stratigraphy comments: Stratigraphy from "Harding and Fremont Formations, Colorado" Sweet 1954.
Lithology and environment
Primary lithology: silty "shale"
Includes fossils?Y
Lithology description: lower silty shale in basal 30 feet of Harding Formation
Environment:marine indet. Tectonic setting:cratonic basin
Geology comments: Environments from S. Holland
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:10391
Authorizer:S. Holland, M. Hopkins Enterer:T. Hanson, M. Hopkins
Modifier:M. Hopkins Research group:marine invertebrate
Created:2001-04-12 12:04:00 Last modified:2015-06-26 14:16:12
Access level:the public Released:2001-04-12 12:04:00
Creative Commons license:CC BY
Reference information

Primary reference:

3835. E. A. Frederickson and J. M. Pollack. 1952. Two Trilobite Genera from the Harding Formation (Ordovician) of Colorado. Journal of Paleontology 26(4):641-644 [S. Holland/T. Hanson]