Sebastian Kennerknecht / Coastline at dusk, Shark Fin Cove, Davenport, California
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Jack Dykinga / Tent rocks in the Peralta Canyon, New Mexico, USA. Rocks are conical formations of eroded volcanic tuff and pumice supporting 'cap rocks'.
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Jack Dykinga / Eroded striated sandstone (petrified sand dunes) Vermilion Cliffs National Monumant, Colorado Plateau, Arizona, USA
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Jack Dykinga / Striated sandstone eroded in circular pattern, dawn, Vermilion Cliffs National Monument, Arizona, USA
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Jack Dykinga / Antelope Canyon, a slot canyon with eroded sandstone patterns and rays of sunlight filtering in, Navajo Reservation, Arizona, USA
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Jack Dykinga / Eroded striated sandstone (petrified sand dunes), Vermilion Cliffs National Monumant, Colorado Plateau, Arizona, USA
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Jack Dykinga / Silhouette of Devils Garden with windows showing between eroded sandstone pinnacles, Grand Staircase - Escalante National Monument, Utah, USA
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Jack Dykinga / Eroded sandstone (petrified sand dunes) in banded striated patterns at sunset, Colorado Plateau, Arizona, USA
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Jack Dykinga / Weathered and eroded monzogranite boulders balanced precariously, sunset, Joshua Tree National Park, Mojave Desert, California, USA
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Jack Dykinga / Eroded striated sandstone with round concretions strewn in geometric patterns, dawn, Vermilion Cliffs National Monument, Colorado Plateau, Arizona, USA
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Jack Dykinga / Eroded sandstone (petrified sand dunes) in banded striated patterns at sunset, Colorado Plateau, Arizona, USA
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Jack Dykinga / Weathered and eroded monzogranite boulders with dikes on crystalline intrusions, sunset, Joshua Tree National Park, Mojave Desert, California, USA
