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BETA TEST - Fossil data and pages are very much experimental and under development. Please report any problems

USGS MR 4522, Marin County, California, USA

Lat/Long (Decimal)37.843,-122.552
Co-ordinates Derivationestimated from map
Given LocationCalifornia, United States
Mindat.org Region (for given coordinates)Marin County, California, USA

Collections

CollectionReferenceStratigraphic NameCommentsLithologyAge
USGS MR 4522, Tennessee Valley, Marin Headlands (M-29)Murchey B. (1984)Assemblage MH-6: Its range is herein considered to be Hauterivian(?) to Albian(?) although correlation with DSDP material (Schaaf,1981) suggests a more restricted late Barremian or Aptian range from the Crolanium pythia zone. Aptian to Early Albian in Kohnen & Murchey, 1995.chert125 - 109 Ma
Early/Lower Cretaceous

Recorded Fossils

Accepted NameHierarchyAge
Zifondium sp.
genus
Chromista : Radiozoa : Polycystina : Nassellaria : Archaeodictyomitridae : Zifondium125 - 109 Ma
Early/Lower Cretaceous
Holocryptocanium barbui
species
Chromista : Radiozoa : Polycystina : Nassellaria : Williriedellidae : Holocryptocanium : Holocryptocanium barbui125 - 109 Ma
Early/Lower Cretaceous

References

Murchey B. (1984) Biostratigraphy and lithostratigraphy of chert in the Franciscan complex, Marin Headlands, California, Franciscan Geology of Northern California Field Trip Guidebook 43, Society of Economic Paleontologists and Mineralogists, Pacific Section, 51-70
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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