Where: Solano County, California (38.2° N, 122.0° W: paleocoordinates 43.4° N, 101.0° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Martinez Formation, Thanetian (59.2 - 56.0 Ma)
• Most of the fossiliferous faunas in the sections near Martinez occur in the lower 800 ft thick sandstone unit. Mollusca suggest a "Martinez" stage age. Martinez local stage = Thanetian. The Martinez Formation rests with a slight unconformity on the Chico Formation and grades in Eocene shales. The formation is approximately 3100 ft thick with a 1500 ft lower sandstone unit and 1600 ft upper sandy shale, which is dated as Early Eocene.
• bed-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified, medium-grained, coarse, glauconitic sandstone
Size class: macrofossils
Collection methods: quarrying,
• Collected and identified by C.E. Weaver. Collections reposited in University of Washington collections.
Primary reference: C. E. Weaver. 1949. Geology of the coast ranges immediately north of the San Francisco Bay region, California. Geological Society of America Memoir 35 [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 52618: authorized by Austin Hendy, entered by Austin Hendy on 11.08.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Polinices hornii, "Euspirocrommium martinezensis" = Amauropsis martinezensis
Polinices hornii Gabb 1864 moon snail
"Euspirocrommium martinezensis" = Amauropsis martinezensis Dickerson 1914 moon snail | |
"Perissolax tricarinatus" = Pseudoperissolax tricarnatus
"Perissolax tricarinatus" = Pseudoperissolax tricarnatus Weaver 1905 murex snail | |
"Priscofusus robustus" = Priscoficus robustus
"Priscofusus robustus" = Priscoficus robustus Weaver 1905 fig shell | |
Turritella infragranulata Gabb 1864 turret shell
Turritella pachecoensis Stanton 1896 turret shell | |
Bivalvia | |
Acila (Truncacila) decisa Conrad 1855 divaricate nutclam | |
| |
"Lima multiradiata" = Acesta (Acesta) multiradiata
"Lima multiradiata" = Acesta (Acesta) multiradiata Gabb 1869 file clam | |
"Volsella merriami" = Modiolus (Modiolus) merriami
"Volsella merriami" = Modiolus (Modiolus) merriami Weaver 1905 mussel | |
Pitar quadratus Gabb 1864 venus clam | |
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle | |
""Tellina" undulifera" = Tellina (Saulella) undulifera, "Tellina martinezensis" = Tellina (Eurytellina) martinezensis
""Tellina" undulifera" = Tellina (Saulella) undulifera Gabb 1869 tellin clam
"Tellina martinezensis" = Tellina (Eurytellina) martinezensis Weaver 1905 tellin clam | |
"Solena stantoni" = Solena (Eosolen) stantoni
"Solena stantoni" = Solena (Eosolen) stantoni Weaver 1905 clam |