Double Micaceous pinstriped gneiss

Identifier

NS-12

Description

Macroscopic: Mesocratic fibrolitic double micaceous pinstripped gneiss. High reflectivity denotes a high concentration of foliated micas. Migmatized texture indicates of the rock indicates incipient melting. Microscopic: This sample contains irregularly shaped muscovite and silimanite which indicates that the muscovite was breaking down to form silimanite due the heat and pressure of metamorphism. Cordierite also present in thin section. Thin section pictures in XPL unless otherwise noted in the title of the picuture. Thin sections are 3mm across.

Fibrolitic: Charaterzied by the presence of fibrolite (sillmanite)

Mesocratic:having nearly equal dark and light mineral constituents

Date

N/A

Spatial Coverage

Temporal Coverage

Unit

Number of Thin Sections

1