Horseshoe Gulch USNM 18138g (Ordovician of the United States)
Also known as Field number Z13a5
Where: California (41.4° N, 122.8° W: paleocoordinates 1.4° S, 74.6° W)
When: Ashgill (449.5 - 443.7 Ma)
• bed-level stratigraphic resolution
Environment/lithology: lithified packstone and lithified wackestone
• "These lenses have maximum exposed thicknesses of about 50 m, range from bedded to massive, and are commonly skeletal-grain ... lime wackestone-packstone."
Size class: macrofossils
Reposited in the BMNH, USNM
Primary reference: J. K. Rigby and A. W. Potter. 1986. Ordovician sphinctozoan sponges from the eastern Klamath Mountains, northern California. The Paleontological Society Memoir 20 1-47 [A. Miller/S. Kolbe]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 99693: authorized by Arnold Miller, entered by Sarah Kolbe on 19.11.2010
Creative Commons license: CC BY (attribution)
Taxonomic list
• Only sponges are described in this reference.
Show authors, comments, and common names
| Rhynchonellata | |
"Paralenorthis cf. parvicrassicostata" = Sulevorthis parvicrassicostatus
"Paralenorthis cf. parvicrassicostata" = Sulevorthis parvicrassicostatus Cooper 1956 | |
|
Sigmelasma "sp. 1" Potter 1990 | |
| Demospongiae | |
|
Girtyocoelia tubula demosponge | |