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USGS MR 5112, Marin County, California, USA
Lat/Long (Decimal) | 37.824,-122.506 |
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Co-ordinates Derivation | estimated from map |
Given Location | California, United States |
Mindat.org Region (for given coordinates) | Marin County, California, USA |
Collections
Collection | Reference | Stratigraphic Name | Comments | Lithology | Age |
---|---|---|---|---|---|
USGS MR 5112, Bonita Cove, Marin Headlands (M-18D) | Murchey B. (1984) | Assemblage MH-7: The probable range of this assemblage is late Albian to early Cenomanian. | chert | 105.3 - 93.5 Ma Cretaceous | |
USGS MR 5117, Bonita Cove, Marin Headlands (M-18C) | 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. | chert | 125 - 109 Ma Early/Lower Cretaceous | |
USGS MR 5116, Bonita Cove, Marin Headlands (M-18B) | Murchey B. (1984) | Assemblage MH-5: MH-5 is correlative with Valanginian to Hauterivian or early Barremian radiolarian zones in circum-Pacific onland sequences as well as with Deep Sea Drilling Project zonation schemes. The range of MH-5 is Valanginian to Hauterivian or early Barremian | chert | 139.8 - 125.45 Ma Early/Lower Cretaceous | |
USGS MR 5112, Bonita Cove, Marin Headlands (M-18A) | Murchey B. (1984) | Assemblage MH-4: upper Middle Jurassic (Bathonian and (or) Callovian) and (or) lower Upper Jurassic (Oxfordian?, Kimmeridgian?). Bathonian to Early Callovian in Kohnen & Murchey, 1995. | chert | 168.3 - 161.2 Ma Jurassic | |
USGS MR 5113, Bonita Cove, Marin Headlands (M-18E) | Murchey B. (1984) | Assemblage MH-4: upper Middle Jurassic (Bathonian and (or) Callovian) and (or) lower Upper Jurassic (Oxfordian?, Kimmeridgian?). Bathonian to Early Callovian in Kohnen & Murchey, 1995. | chert | 168.3 - 161.2 Ma Jurassic |
Recorded Fossils
Accepted Name | Hierarchy | Age |
---|---|---|
Acanthocircus sp. genus | Retaria : Radiolaria : Entactinaria : Saturnalidae : Acanthocircus | 139.8 - 125.45 Ma Early/Lower Cretaceous |
Thanarla brouweri species | Chromista : Radiozoa : Polycystina : Nassellaria : Archaeodictyomitridae : Thanarla : Thanarla brouweri | 139.8 - 125.45 Ma Early/Lower Cretaceous |
Zifondium sp. genus | Chromista : Radiozoa : Polycystina : Nassellaria : Archaeodictyomitridae : Zifondium | 125 - 109 Ma Early/Lower Cretaceous |
Ristola turpicula species | Chromista : Radiozoa : Polycystina : Nassellaria : Parvicingulidae : Ristola : Ristola turpicula | 168.3 - 161.2 Ma Jurassic |
Pseudodictyomitra sp. genus | Chromista : Radiozoa : Polycystina : Nassellaria : Pseudodictyomitridae : Pseudodictyomitra | 125 - 109 Ma Early/Lower Cretaceous |
Holocryptocanium barbui species | Chromista : Radiozoa : Polycystina : Nassellaria : Williriedellidae : Holocryptocanium : Holocryptocanium barbui | 105.3 - 93.5 Ma Cretaceous |
References
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!