Jewett Sand (Miocene of the United States)

Where: Kern County, California (35.3° N, 119.3° W: paleocoordinates 34.3° N, 113.1° W)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Jewett Sand Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• A marginal sand body that unconformably overlies the Vedder Formation or Walker Formation. The contact with the overlying Freeman Silt is gradational and intertonguing. The Pyramid Hill Sand is included as the lower member of the Jewett Sand. The type section is 675 ft thick.

• formation-level stratigraphic resolution

Environment/lithology: coastal; fine, concretionary, silty sandstone

• Exposures of the Jewett Sand are typically silty concretionary very fine to fine-grained sandstone.

Size class: macrofossils

Preservation: mold/impression, concretion

Reposited in the CAS, LACM, UCMP

Collection methods: quarrying,

• Collections housed at various institutes: USGS (Wasington and Menlo Park), UCMP, LACM, CAS, Stanford University, UCLA, UCR.

Primary reference: W.O. Addicott. 1970. Miocene Gastropods and Biostratigraphy of the Kern River Area, California. United States Geological Survey Professional Paper 642:1-172 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 38029: authorized by Austin Hendy, entered by Austin Hendy on 31.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropods; includes some occaisional other taxa