Thera, Greece (#2)

A quarry in the 1600 BC pumice fall and pyroclastic-flow deposits near the town of Phera, Greece, provided the light-weight aggregate used in the concrete to build the Suez Canal.
Photo copyright R. W. Decker.
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A quarry in the 1600 BC pumice fall and pyroclastic-flow deposits near the town of Phera, Greece, provided the light-weight aggregate used in the concrete to build the Suez Canal.
Photo copyright R. W. Decker.