UMass Sesquicentennial

Mylonite in Northborough

A closeup of a microcline porphyroclast withinin a thin mylonite zone in Northborough.

The mylonite zone in question is one of many branches of the now dormant, but long-active, Clinton Newbury Fault Zone that transects Massachusetts from Worcester to Newburyport-- just one of the several ancient fault zones that play a significant role in the geologic history of the Commonwealth.

Location

The MA Geological Survey
Department of Geosciences
269 Morrill Science Center
University of Massachusetts
611 North Pleasant Street
Amherst, MA 01003-9297

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