Graywacke

Title

Alternative Title

Siltstone

Identifier

FR-13

Description

Equal mix of angular and rounded sand-sized grains of quartz, with clay sized feldspars. Surface contains significant coverage of calcite that formed after lithification. Fresh surfaces do not effervesce with acid meaning that reaction is based on secondary calcite formation.

(Thin Section FOV: 1.28mm)

Date

Not given

Temporal Coverage

Accrual Method

Purchased from Western Minerals, Inc.

Number of Thin Sections

1