150 meters north of Harding Quarry, northwest of CaƱon City: Franklinian, Colorado

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Pteraspidomorpha - Astrapidiformes - Astraspididae
Astraspis desiderata Walcott 1892
see common names

Geography
Country:United States State/province:Colorado County:Fremont
Coordinates: 38.5° North, 105.3° West (view map)
Paleocoordinates:14.4° South, 73.7° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Ordovician Epoch: Late Ordovician
10 m.y. bin: Ordovician 4-5
Key time interval: Franklinian Conodont zone:  Phragmodus undatus
Age range of interval: 457 - 449.8 m.y. ago
Stratigraphy
Formation:Harding Sandstone
Stratigraphic resolution:formation
Lithology and environment
Primary lithology: sandstone
Environment:open shallow subtidal
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:FMNH,USNM
Metadata
Database number:155772
Authorizer:P. Wagner Enterer:P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2014-04-30 21:32:38 Last modified:2016-12-22 23:29:50
Access level:the public Released:2014-04-30 21:32:38
Creative Commons license:CC BY
Reference information

Primary reference:

50951. I. J. Sansom, M. P. Smith, M. M. Smith and P. Turner. 1997. Astraspis, the anatomy and histology of an Ordovician fish. Palaeontology 40(3):625-643 [P. Wagner/P. Wagner]