Jack Dykinga / Morning light with autumn coloured Cottonwoods (Populus sp) trees lining the river. Valley of the Gods, Colorado Plateau, of the Great Basin Desert, Utah, USA, November 2018.
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Jouan Rius / Sandstone cliff at sunset, Colorado Plateau, Kodachrome Basin State Park, Utah, USA November 2012
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Jouan Rius / Sandstone monoliths, Colorado Plateau, Kodachrome Basin State Park, Utah, USA November 2012
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David Noton / Flamingos on Laguna / Lake Colorada at dawn, Eduardo Avaroa Andean Fauna National Reserve, Bolivia, December 2009
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Jack Dykinga / Desert varnish coloured canyon walls in Navajo sandstone cliffs showing drip marks across cliff face, Colorado Plateau, Arizona, USA
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Jack Dykinga / Concretion balls lining fracture lines in petrified sand dune formation, with lichen scaring calcification marks, Colorado Plateau, Arizona, USA
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Jack Dykinga / Striated sandstone patterns in petrified sand dunes caused by erosion, Vermilion Cliffs National Monument, Colorado Plateau, 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 / Eroded striated sandstone (petrified sand dunes), Vermilion Cliffs National Monumant, 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 / 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
