Jack Dykinga / Aerial view of volcanic cinder cone of Cerro Colorado at dawn, Biosphere Reserve of Pinacate and Gran Desierto Altar, Sonora, Mexico
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Jack Dykinga / Aerial view of Sykes crater with MacDougal crater and Sierra Hornaday in the background, Biosphere reserve of Pinacate and Gran Desierto Altar, Sonora, Mexico
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Pete Oxford / Palo Santo (Bursera graveolens) trees and Mangroves (Avicennia sp) in bay surround cinder cone, Floreana Island, Galapagos Islands, Ecuador
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Tim Fitzharris / Joshua Tree (Yucca brevifolia), cinder cones, and other desert vegetation, Mojave National Preserve, California
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Tim Fitzharris / Joshua Tree (Yucca brevifolia), cinder cones, and other desert vegetation, Mojave National Preserve, California
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Tim Fitzharris / Cinder cones at Mojave National Preserve, California
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Steve Gettle / Bahia Sullivan looking towards cinder cones on Santiago Island taken from Bartolome Island, Galapagos Islands, Ecuador
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Yva Momatiuk & John Eastcott / Volcanic gray cinder deposits of Ubehebe Crater, Death Valley National Park, California
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Hiroya Minakuchi / Bahia Sullivan looking towards cinder cones on Santiago Island taken from Bartolome Island, Galapagos Islands, Ecuador
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Doug Perrine / Mauna Kea silversword (Argyroxiphium sandwicense) growing on the slopes of the Mauna Kea volcano, with Pu'u Kole cinder cone and Mauna Loa volcano behind, Big Island, Hawaii, USA.
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Doug Perrine / Mauna Kea silversword (Argyroxiphium sandwicense) in flower on slope of Mauna Kea volcano, with Pu'u Kole cinder cone and Mauna Loa volcano behind, Big Island, Hawaii, USA.
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Doug Perrine / Mauna Kea silversword (Argyroxiphium sandwicense) in flower on slope of Mauna Kea volcano, with Pu'u Kole cinder cone and Mauna Loa volcano behind, Big Island, Hawaii, USA.
