Glacial erratics: landscape found art (and origins of cubism)

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Helping to build a road today, I threw a rock (about 0.4 cubic feet in volume) into the road bed. The end of the rock shattered and revealed the ultimate source of Cubism. “Fractured planes” is a good short description of Cubism.

Today’s fractured rock is on the left; Braque’s Rio Tinto Factories at L’Estaque, 1910, at right.