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Hosselkus Limestone, California, USA

FormationHosselkus Limestone
Age:237 - 209 Ma
Late/Upper Triassic
IntervalCarnian - Norian
Tectonic SettingVolcanic basin
Lithologylimestone
Number of Collections4
Number of Occurrences11

Recorded Sample Locations

LocationRegionStratigraphic Name
Big Bend QuadrangleSiskiyou County, California, USAHosselkus Limestone
Near Brushy Slope camp on the western side of Brock MountainShasta County, California, USAHosselkus Limestone
North Fork of Squaw CreekShasta County, California, USAHosselkus Limestone
Smith Cove Shasta County, California, USAHosselkus Limestone

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Arvison209 - 201 Ma
Mesozoic
sandstone3
Modin - Devils Canyon228 - 201 Ma
Mesozoic
siliciclastic16
Modin - Kosk209 - 201 Ma
Mesozoic
siliciclastic3
Potem170 - 164 Ma
Middle Jurassic
siliciclastic, sandstone23

Recorded Fossils

Accepted NameHierarchyAge
Shastasaurus sp.
genus
6Animalia : Chordata : Reptilia : Shastasauridae : Shastasaurus237 - 228 Ma
Late/Upper Triassic
Shastasaurus pacificus
species
7Animalia : Chordata : Reptilia : Shastasauridae : Shastasaurus : Shastasaurus pacificus237 - 228 Ma
Late/Upper Triassic
Nectosaurus sp.
genus
6Animalia : Chordata : Reptilia : Thalattosauridae : Nectosaurus237 - 228 Ma
Late/Upper Triassic
Nectosaurus halius
species
7Animalia : Chordata : Reptilia : Thalattosauridae : Nectosaurus : Nectosaurus halius237 - 228 Ma
Late/Upper Triassic
Thalattosaurus sp.
genus
6Animalia : Chordata : Reptilia : Thalattosauridae : Thalattosaurus237 - 228 Ma
Late/Upper Triassic
Halobia austriaca
species
7Animalia : Mollusca : Bivalvia : Ostreida : Halobiidae : Halobia : Halobia austriaca237 - 208.5 Ma
Late/Upper Triassic
Halobia superba
species
7Animalia : Mollusca : Bivalvia : Ostreida : Halobiidae : Halobia : Halobia superba237 - 208.5 Ma
Late/Upper Triassic
Arcestes (Proarcestes) shastensis
species
7Animalia : Mollusca : Cephalopoda : Ceratitida : Arcestidae : Proarcestes : Arcestes (Proarcestes) shastensis237 - 208.5 Ma
Late/Upper Triassic
Clionites (Shastites) whitneyi
species
7Animalia : Mollusca : Cephalopoda : Ceratitida : Sandlingitidae : Shastites : Clionites (Shastites) whitneyi237 - 208.5 Ma
Late/Upper Triassic
Gymnotropites americanus
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Tropitidae : Gymnotropites : Gymnotropites americanus237 - 208.5 Ma
Late/Upper Triassic

References

Merriam J. C. (1906) Notes on the osteology of the thalattosaurian genus Nectosaurus, University of California Publications, Bulletin of the Department of Geology 5 13, 217-223
Sanborn A. F. (1960) Geology and Paleontology of the southwest quarter of the Big Bend Quadrangle, Shasta County, California, California Division of Mines, Special Report 63, 18-26
Callaway J. M., Massare J. A. (1989) Shastasaurus altispinus (Ichthyosauria, Shastasauridae) from the Upper Triassic of the El Antimonio District, northwestern Sonora, Mexico, Journal of Paleontology 63 6, 930-939
Nicholls E. L. (1999) A reexamination of Thalattosaurus and Nectosaurus and the relationships of the Thalattosauria (Reptilia: Diapsida), PaleoBios 19 1, 1-29
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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