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Vegetation is lush along the edge of the Jordan Craters lava field. Jordan Craters is a 27-square mile olivine basalt lava flow that is estimated to be between 4,000 and 9,000 years old, based on the degree of lichen development on the rocks. An 18-acre flow within the field is thought to be less than 100 years old because not even lichens have begun to colonize it.

Friends of the Owyhee's "Best of the Owyhee Auto Tour" of Leslie Gulch, Jordan Craters and Birch Creek Historic Ranch, Jordan Valley, Oregon, March 27-29, 2015.
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(C) 2015 Gregg Mizuta
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2015 Best of the Owyhee Auto Tour
Vegetation is lush along the edge of the Jordan Craters lava field. Jordan Craters is a 27-square mile olivine basalt lava flow that is estimated to be between 4,000 and 9,000 years old, based on the degree of lichen development on the rocks. An 18-acre flow within the field is thought to be less than 100 years old because not even lichens have begun to colonize it.<br /> <br /> Friends of the Owyhee's "Best of the Owyhee Auto Tour" of Leslie Gulch, Jordan Craters and Birch Creek Historic Ranch, Jordan Valley, Oregon, March 27-29, 2015.