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Whitehall - Routes 4 and 22

Metagabbro Boudin in garnet-sillimanite mylonitic gneiss (khondalite) south of Whitehall, New York.

Whitehall Routes 4 and 22
Located in Washington County
Image courtesy of Glenn B. Stracher and Nancy Lindsley-Griffin

Type: Roadcut.

Features: Ductile and brittle deformation: Igneous and metamorphic rocks.

Features Type: Structural.

Reference: NYS Geological Association Field Trip Guidebook, 74th Annual Meeting 2002;
Precambrian Geology of the Whitehall Area, Southeastern Adirondacks.
For online reference please visit -

Quadrangle: Fort Ann.

Reason for Designation: Identified as a unique geologic feature by the NYS Geological Highway Map
(NYS Museum, NYS Geological Survey).