Arkosic Graywacke

Title

Arkosic Graywacke

Alternative Title

Sandstone

Identifier

FR-1

Description

Grain sizes sand to silty sand, rounded and angular with very minor examples of weathering and thin quartz vein present. Collected from the same quarry as FR-2. (FOV: 1.28mm)

Date

Not given

Contributor

Western Minerals, Inc.

Is Part Of

Stratigraphic Suite- Franciscan Rocks, California

Spatial Coverage

Unsurveyed portion of T 3 S, R 5 W near Brisbane. CPA company quarry 4100 ft. east from "Peak 1314" in
the San Bruno mountains.

Temporal Coverage

Mesozoic

Accrual Method

Purchased from Western Minerals, Inc.