Gabbro

Gabbro is a dark, coarse-grained mafic igneous rock containing an abundance of magnesium and iron-bearing minerals such as pyroxene and olivine. Maine’s Cape Neddick lighthouse, in York, was built upon a large mass of gabbro.

Location: Pike Quarry, Wells, York County

Gift of Pike Industries, Inc.

Specimen Sponsorship: $5,000