Athol Pegmatite

This Pegmatite, is the smallest amount of Igneous Rock mass, in the town, Athol’s Mica Mine, and other pockets maybe located hidden under the soils. It was formed, as the granite cores were cooling down, after heating masses of the surround rock. Cracks and large pockets filled with hot magma, the Pegmatite, cooled at a slower rate, allowing the mineral crystals to grow to a large size.The feldspar crystals to four feet long, and mica to four inch books, but not that large, to make it marketable, quartz and beryl are also present. This formed, at ~300 M.O.Y.A. in the Cisuralian Epoch of the Permlian Period, of the Palraperozoic, Eon.

By Paul K. Kachinsky and Chris Coyle