Chimney Butte in the Hopi Buttes area showing columnar basalt jointing.

Chimney Butte in the Hopi Buttes area. This interesting volcano is one of the few in the area featuring a good number of columnar jointed basalt colonnades, an indicator the magma came in contact with a body of water on one end, creating rapidly-cooling shrinkage crystals. via Instagram instagr.am/p/CYovPD_lKFX/

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