Graywacke Siltstone

Identifier

FR-5

Description

Angular, silty size gains, composed of equal parts quatz, feldspars and rock fragments. Prominent orange and brown surface oxydation on all samples. Some samples contain evidence of bedding planes. Calicte is found along bedding planes, as well as on some surfaces perpendicular to bedding. Some samples include very fine calcite veins (<0.5mm) intersecting through the bedding planes. (FOV: 1.28)

Date

Not given

Temporal Coverage

Accrual Method

Purchased from Western Minerals, Inc.

Number of Thin Sections

1