MMGM is Closed. We'll reopen Wed at 10 AM


Slate is a fine-grained, foliated (layered) metamorphic rock that has a variety of commercial applications including blackboards, pool tables, roofing tile, and switchboards. Slate quarrying of the Carrabassett Formation in central Maine was well established by the 1880s.

Gift of Sheldon Slate Products Co. Inc.

Specimen Sponsorship: $10,000

slate specimen rock garden

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