Also known as A 3536

Where: Baja California Sur, Mexico (26.0° N, 111.1° W: paleocoordinates 25.8° N, 109.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: San Marcos Formation, Early/Lower Pliocene (5.3 - 3.6 Ma)

• A small area of San Marcos Formation is exposed along the western shore of Puerto de la Lancha. An irregular surgface carved from the Comondu underlies the formation. The lower 150 ft are volcanic conglomerate. The upper 120 ft are alternating layers of volcanic gravel and limestone, the latter being composed almost entirely of Chione shells.

• bed-level stratigraphic resolution

Environment/lithology: coastal; shelly/skeletal conglomerate and shelly/skeletal limestone

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 43841: authorized by Austin Hendy, entered by Austin Hendy on 26.08.2004

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)