Ashley Cooper / Excavating volcanic Scorai rock from the Seydisholar cone for road building material, near Selfoss, Iceland, September 2010.
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Claudio Contreras / Granite formation and Sonoran Desert, Catavi, Valle de los Cirios Biosphere Reserve, Baja California Peninsula, Mexico, March
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Claudio Contreras / Granite rock formations and Sonoran Desert, Catavi-a, Valle de los Cirios Biosphere Reserve, Baja California Peninsula, Mexico, May
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Claudio Contreras / Granite rock formation and Sonoran Desert, Catavi, Valle de los Cirios Biosphere Reserve, Baja California Peninsula, Mexico, May
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Nick Upton / Rugged volcanic rock coastline at Puerto de la Torre, Fuerteventura, Canary Islands, June.
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Nick Upton / Cliffs with layers of volcanic ash, pumice and lava from successive eruptions, much undermined and eroded by the sea, La Pared, Fuerteventura, Canary Islands, May.