Grand+Mesa+Geological+Trip



Stop 1 Old Powderhorn Coal Mine

Stop 2 Cameo

Stop 3 Crossbedding at the Eagle's Nest Truck Stop

Stop 4, 5, 6 Old Highway (Crossbedding, salt deposits, mud rock)

Stop 7 Evidence of landslide

Stop 8 Roan Plateau view

Stop 9 Prehistoric worms

Stop 10 KT Boundary and Ohio Congomeratic Unit

Stop 11 Wasatch Formation

Stop 12 Panorama of Grand Valley

Stop 13 Mesa Lakes Lodge

Geologic History About 10 million years ago, a basaltic lava flow filled a prehistoric valley composed primarily of sandstone. This lava flow eventually cooled and the surrounding sandstone weathered and eroded away over millions of years. Eventually, only the basalt layer remained, becoming the Grand Mesa we know today.