Where: Marin County, California (37.8° N, 122.5° W: paleocoordinates 27.0° N, 57.7° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Pliensbachian (190.8 - 182.7 Ma)
• Assemblage MH-1: Pliensbachian (probably late) and (or) Toarcian. Only Pliensbachian, according to Kohnen & Murchey, 1995.
• bed-level stratigraphic resolution
Environment/lithology: basinal (siliceous); lithified chert
Size class: macrofossils
Reposited in the USGS
Primary reference: B. Murchey. 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 [M. Clapham/M. Clapham]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 185250: authorized by Matthew Clapham, entered by Matthew Clapham on 17.04.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
| Protozoa | |
|
Trillus elkhornensis Pessagno and Blome 1980 radiolarian
Pantanellium "sp. A" Pessagno 1977 radiolarian | |
|
Nassellaria "indet. A" Ehrenberg 1875 radiolarian | |
|
Bagotum aff. modestum Pessagno and Whalen 1982 radiolarian
Canutus rockfishensis Pessagno and Whalen 1982 radiolarian | |
|
? Hsuum "sp. A" Pessagno 1977 radiolarian | |
"Napora "sp. A"" = Napora, "Jacus "sp. A"" = Napora, "Jacus "sp. B"" = Napora, ? Dumitricaella aff. cucurbitina
"Napora "sp. A"" = Napora Pessagno 1977 radiolarian
"Jacus "sp. A"" = Napora Pessagno 1977 radiolarian
"Jacus "sp. B"" = Napora Pessagno 1977 radiolarian
? Dumitricaella aff. cucurbitina De Wever 1982 radiolarian | |
|
Stichocapsa "sp. A" Haeckel 1881 radiolarian
? Eucyrtidium "sp. A" Ehrenberg 1847 radiolarian
? Eucyrtidium "sp. B" Ehrenberg 1847 radiolarian | |
|
Canoptum poissoni Pessagno et al. 1979 radiolarian
Canoptum anulatum Pessagno and Poisson 1981 radiolarian | |
|
Katroma aff. neagui Pessagno and Poisson 1981 radiolarian | |