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: general faunal/floral analysis
PaleoDB collection 52611: authorized by Austin Hendy, entered by Austin Hendy on 11.08.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Turritella infragranulata Gabb 1864 turret shell
Turritella pachecoensis Stanton 1896 turret shell | |
"Euspirocrommium martinezensis" = Amauropsis martinezensis, Polinices hornii
"Euspirocrommium martinezensis" = Amauropsis martinezensis Dickerson 1914 moon snail
Polinices hornii Gabb 1864 moon snail | |
Siphonalia lineata Stanton 1896 true whelk | |
"Perissolax tricarnatus" = Pseudoperissolax tricarnatus
"Perissolax tricarnatus" = Pseudoperissolax tricarnatus Weaver 1905 murex snail misspelled as "Perissolax tricarinatus"
| |
"Priscofusus robustus" = Priscoficus robustus
"Priscofusus robustus" = Priscoficus robustus Weaver 1905 fig shell | |
Bivalvia | |
Pitar quadratus Gabb 1864 venus clam | |
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle | |
Anthozoa | |
"Flabellum remondianum" = Flabellum cuneiforme
"Flabellum remondianum" = Flabellum cuneiforme Lonsdale 1845 stony coral | |
"Trochocyathus zitteli" = Palaeopsammia zitteli
"Trochocyathus zitteli" = Palaeopsammia zitteli Vaughan 1900 stony coral |