Yva Momatiuk & John Eastcott / Petrified wood log with intricate patterns and colors, Petrified Forest National Park, Arizona
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Jack Dykinga / Broken fossilized tree sections lining an arroyo, Petrified Forest National Park, Arizona, USA
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Jack Dykinga / Broken fossilized tree sections balanced on clay pedestals in sunset light, Petrified Forest National Park, Arizona, USA
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Ingo Arndt / Petrified wood, Petrified Forest National Park, Arizona
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Ingo Arndt / Petrified wood, Petrified Forest National Park, Arizona
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Ingo Arndt / Petrified wood, cut and polished with intricate patterns and colors, Petrified Forest National Park, Arizona
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Ingo Arndt / Petrified wood segments from a large tree, Petrified Forest National Park, Arizona
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Ingo Arndt / Petrified wood segments from a large tree, Petrified Forest National Park, Arizona
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John Cancalosi / Newspaper Rock petroglyphs, made by indigenous people inhabiting the Puerco river valley 650- 2000 years ago, Petrified forest National Park, Arizona, USA, August 2010
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John Cancalosi / Petrified trees (Araucarioxylon arizonicum) from the Triassic period 200-250 million years ago, Petrified forest National Park, Arizona, August 2010
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John Cancalosi / Petrified trees (Araucarioxylon arizonicum) from the Triassic period 200-250 million years ago, Petrified forest National Park, Arizona, August 2010
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John Cancalosi / Petrified trees (Araucarioxylon arizonicum) from the Triassic period 200-250 million years ago, Petrified forest National Park, Arizona, August 2010
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Thomas Lazar / Close-up of petrified rock log chips on dried and cracking crust, Petrified Forest National Park, Arizona, USA, March 2008
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Thomas Lazar / Close-up of petrified rock showing the intricate colours and patterns in exposed inner rock of a petrified log, Petrified Forest National Park, Arizona, USA, March 2008
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Thomas Lazar / Close-up of petrified rock showing the intricate colours and patterns in exposed inner rock of a petrified log, Petrified Forest National Park, Arizona, USA, March 2008
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Thomas Lazar / Close-up of petrified rock showing the intricate colours and patterns in exposed inner rock of a petrified log, Petrified Forest National Park, Arizona, USA, March 2008
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Thomas Lazar / Petrified tree logs and stumps on slopes of badlands with banded sedimentary rock "haystacks" in background, Petrified Forest National Park, Arizona, USA, March 2008
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Thomas Lazar / Petrified tree logs and stumps on slopes of badlands with banded sedimentary rock "haystacks" in background, Petrified Forest National Park, Arizona, USA, March 2008
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Thomas Lazar / Petrified tree logs and stumps on slopes of badlands with banded sedimentary rock "haystacks" in background, Petrified Forest National Park, Arizona, USA, March 2008
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Kirkendall-Spring / Petrified wood near Chinde Point in Petrified Forest National Park, Arizona, USA
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Kirkendall-Spring / Petrified wood on Blue Mesa in Petrified Forest National Park, Arizona, USA
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Tim Fitzharris / Petrified tree trunks, Rainbow Forest, Petrified Forest National Park, Arizona
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Philippe Clement / Ancient petroglyphs near Puerco Pueblo made by ancestral Puebloan people showing anthropomorphs (human-like figures) and zoomorphs (animal-like figures), Petrified Forest National Park, Arizona, USA
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Philippe Clement / Agate House, an Indian pueblo (community) built with petrified wood. Petrified Forest National Park, Arizona, USA. 2007
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Philippe Clement / Agate House, an Indian pueblo (community) built with petrified wood. Petrified Forest National Park, Arizona, USA. 2007
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Philippe Clement / Agate House, an Indian pueblo (community) built with petrified wood. Petrified Forest National Park, Arizona, USA. 2007
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Philippe Clement / The Painted Desert, part of the Petrified Forest National Park stretches some 50,000 acres of colorful mesas, butes, and badlands, Arizona, USA May 2007
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Philippe Clement / The Painted Desert, part of the Petrified Forest National Park stretches some 50,000 acres of colorful mesas, butes, and badlands, Arizona, USA
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Philippe Clement / The Painted Desert, part of the Petrified Forest National Park stretches some 50,000 acres of colorful mesas, butes, and badlands, Arizona, USA May 2007
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Philippe Clement / The Painted Desert, part of the Petrified Forest National Park stretches some 50,000 acres of colorful mesas, butes, and badlands, Arizona, USA May 2007
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Philippe Clement / 'Newspaper Rock' Anasazi Indian petroglyphs showing anthropomorphs (human-like figures), zoomorphs (animal-like figures) and katsinas (spiritual figures), Petrified Forest National Park, Arizona
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Philippe Clement / 'Newspaper Rock' Anasazi Indian petroglyphs showing anthropomorphs (human-like figures), zoomorphs (animal-like figures) and katsinas (spiritual figures), Petrified Forest National Park, Arizona
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Jack Dykinga / Petrified logs and eroded clay formations, Blue Mesa, Petrified Forest NP, Arizona, USA at sunset with storm clouds behind
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Jack Dykinga / Petrified logs, Blue Mesa, Petrified Forest NP, Arizona, USA at sunset with full moon
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Tim Fitzharris / Petrified logs, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Petrified wood, cut and polished with intricate patterns and colors, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Petrified wood, cut and polished with intricate patterns and colors, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Petrified wood, cut and polished with intricate patterns and colors, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Petrified wood, cut and polished with intricate patterns and colors, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Blue Mesa formation, erosion showing colorful bands tinted by metals and minerals, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Blue Mesa formation, erosion showing colorful bands tinted by metals and minerals, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Logs and chunks of petrified wood rest on slopes and small hills near dry washes, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Logs and chunks of petrified wood rest on slopes and small hills near dry washes, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Logs and chunks of petrified wood rest on slopes and small hills near dry washes, Petrified Forest National Park, Arizona
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Michael & Patricia Fogden / Petrified logs, Petrified Forest National Park, Arizona
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Daniel Gomez / Aerial view of badlands, Petrified Forest NM, Patagonia, Argentina
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John Cancalosi / Petrified logs. Late Triassic Petrified Forest NP. Arizona USA 225 million years before present
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Ingo Arndt / Petrified wood segments, Petrified Forest National Park, Arizona
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Ingo Arndt / Petrified wood, cut and polished with intricate patterns and colors, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Logs and chunks of petrified wood rest on slopes and small hills near dry washes, Petrified Forest National Park, Arizona
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Yva Momatiuk & John Eastcott / Logs and chunks of petrified wood rest on slopes and small hills near dry washes, Petrified Forest National Park, Arizona