Three Sister Rocks of Monument Valley, Arizona
Three Sisters rock formation in Monument Valley on the border of Arizona and Utah, Monument Valley's isolated rock formations are eroded remains of their Rocky Mountain ancestors, formed by sandstone deposits and geologic uplift and then shaped by wind and water. Three main layers of Organ Rock shale, de Chelly sandstone, and Moenkopi shale are visible in many of the buttes. The rock layers formed during the Permian and Triassic Periods several hundred million years ago that have been subjected to differential erosion (by which hard rocks erode more slowly than soft rocks). The results can be quite complex and stunningly beautiful.
Because Monument Valley was formed from several layers of rock with varying hardness, we are left with magnificently sculpted buttes "Three Sister Rocks", the result of millions of years of simple erosion by water, wind and varying temperature
#GeologyHelp #Environment #Discovering #Strange #World #Area #Ariona #Triassic
