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Chris White

Quincy or
An alkaline, nonorogenic granite intruded into in the / as it cruised from peri- to , before assembling in the (). It’s coarse, with the of amphiboles(?) (possibly riebeckite?)…I’m no petrologist. From@the Eaton’s Pond conservation area@at the border. My photos.

A macro photograph shows a centimeter scale phenocryst of a dark mineral, probably an amphibole, in a ground massof quartz and feldspar.
An abandoned quarry appears below and left of a line of pitch pines.
Feb 16, 2023, 12:40 AM·Public·Metatext
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