1 mile west of Silverthorn's ferry (Triassic of the United States)
Where: Shasta County, California (40.8° N, 122.3° W: paleocoordinates 9.7° N, 46.8° W)
• coordinate based on nearby landmark
When: Pit Formation, Middle Triassic (247.2 - 237.0 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified, cherty/siliceous shale
Size class: macrofossils
Primary reference: J. P. Smith. 1914. The Middle Triassic marine invertebrate faunas of North America. United States Geological Survey Professional Paper 83:1-254 [D. Bottjer/C. Powers/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 33195: authorized by David Bottjer, entered by Catherine Powers on 23.07.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
Crinoidea | |
Pentacrinus ? asteriscus Meek and Hayden 1858 Sea lily |