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Grand Mesa Land O Lakes Viewpoint
Land o' Lakes viewpoint, Grand Mesa --- This mesa located at 10,000 feet elevation is one of the largest flat-topped mountains in the world covering 50 square miles. Hard Tertiary basalts resisted erosion to form the flat mesa.
Trail Eto River
Harpers Corner, Dinosaur National Monument --- At the floor of these canyons of the Colorado Plateau run the Green and Yampa Rivers.
Basalt Cliffs
IGNEOUS - EXTRUSIVE: Basalt cliffs, Grand Mesa --- Tertiary basalt flowed down a valley and hardened. Later erosion formed these cliffs where the hard basalt caps the mesa. Grand Mesa is an inverted valley -- what was low has now become high.