Grand Canyon Lava Flows
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Grand Canyon Lava Flows (216,374 bytes) ( 1,280 x 1,024 )
The Grand Canyon is one of the most spectacular geologic features on Earth. Few people realize that the Canyon also offers some of the most unique volcanic features in North America. These features reveal a battle between the lava flows, which cascaded into the river, making a series of dams and enormous lakes, and the power of the Colorado River, which cut through the dams to return itself to equilibrium. The Uinkaret Volcanic Field covers about 500 square km, extending about 80 km north from the Colorado River. The volcanic features, basaltic cinder cones and lava flows, lie within the Canyon and on the plateaus to the north. In the last 2 million years, more than 150 lava flows have poured into the Grand Canyon. These flows formed 13 major lava dams that ranged in height from 60 m to 600 m in height. The largest dam impounded a lake that was more than 600 m deep and had a shoreline near the base of the Redwall Limestone. Two lakes were so large that they extended into Utah and beyond the present shoreline of Lake Powell. Most of the lava dams are less than 1.2 million years old. Data for this ASTER perspective view was acquired on June 22, 2003 and is located near 36.2 degrees north latitude, 113.2 degrees west longitude.
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||Grand Canyon Lava Flows |
Size: (216,374 bytes)
Resolution ( 1,280 x 1,024 )
Please give credit for these images to:
NASA/METI/AIST/Japan Space Systems,
and U.S./Japan ASTER Science Team