Staurolite chloritoid schist

Title

Staurolite chloritoid schist

Identifier

DUCO-8

Description

Schist bearing both staurolite and chloritoid. This marks the first appearance of staurolite in the metamorphic sequence. Also contains garnet, muscovite, chlorite, biotite, feldspar, and quartz. The assemblage in not in equilibrium.

The thin section shows large chloritoid grains with staurolite (an assemblage not in equilibrium). Fine grained muscovite and biotite are also present, along with micro-crystalline quartz and several graphite strings.

This rock is right at the transition between the garnet-staurolite zones in the Barrovian metamorphic sequence (intermediate (increasing) metamorphism).

Contributor

Western Minerals

Is Part Of

<a href="http://geosciencecollections.milne-library.org/collections/show/18">Barrovian Metamorphic Sequence--Dutchess County, New York</a>

Spatial Coverage

Dutchess Co., NY

Accrual Method

Purchased from Western Minerals Inc.

Unit

Barrovian Metamorphic Sequence

Number of Thin Sections

1

Geolocation