•  Troy   ( @troyunrau@lemmy.ca ) OP
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    61 year ago

    From where I’m sitting in my home office, there is an array of glacial boulders in the flower bed outside my window. I picked them from a farmer’s field (with permission) – a wide assortment and roundish. As a geophysicist, I only know three rocks, and all three are present: granite, not-granite, and maybe-granite.