Also known as A 3543
Where: Baja California Sur, Mexico (32.4° N, 117.3° W: paleocoordinates 32.2° N, 116.0° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: San Marcos Formation, Early/Lower Pliocene (5.3 - 3.6 Ma)
• The volcanic breccia of the Comondu Formation, and clays are overlain with a marked angular unconformity by limestone, usually with scattered volcanic cobbles and boulders at the base. The lower part of the succession is predominantly a light colored algal limestone, while the upper part if a coral-reef zone or reworked coral limestone.
• bed-level stratigraphic resolution
Environment/lithology: coastal; calcareous conglomerate
Size class: macrofossils
Reposited in the UCMP
Collection methods: quarrying,
• Material reposited in the UCMP collections
Primary reference: J. W. Durham. 1950. 1940 E.W. Scripps cruise to the Gulf of California. Part II - Megascopic paleontology and marine stratigraphy. Geological Society of America Memoir 43(2) [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 43840: authorized by Austin Hendy, entered by Austin Hendy on 26.08.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Ostrea vespertina" = Dendostrea vespertina
"Ostrea vespertina" = Dendostrea vespertina Conrad 1855 oyster | |
"Panopea taeniata" = Panopea globosa
"Panopea taeniata" = Panopea globosa Dall 1898 clam | |
Gastropoda | |
Conasprella sp. Thiele 1929 cone shell |