Orthopyroxene (grey interference colors at XPL) with large clinopyroxene rim in association with biotite and alkali-feldsapar in a "shonkinite" (melanocratic foid syenite) from Lincoln syenite intrusion, Maine, USA. #alexstrekeisen #shonkinite #maine #usa pic.twitter.com/HFooa26Qhi
— Alexstrekeisen (@alexstrekeisen) May 3, 2021
via Twitter https://twitter.com/alexstrekeisen
May 03, 2021 at 11:08PM
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