Sillimanite-garnet-biotite-quartz-plagioclase gneiss

Identifier

AD-4

Description

The predominant lithology of the Peck Lake Formation is a sillimanite-garnet-biotite-quartz-oligoclase gneiss with pods and lenses consisting of two feldspars and quartz (anatectic?). The lithology is widespread throughout the Adirondacks and may represent a metapelite or metagraywacke. European geologists have referred to similiar lithologies as "kinzigites" (deWaard, 1962).
Thin section shows sillimanite, quartz, biotite and plagioclase.

Date

1980

Contributor

Temporal Coverage

Accrual Method

Purchased from Western Minerals Inc.

Number of Thin Sections

1

Geolocation