Sphinx Mountain is a very recognizable, somewhat isolated mountain in Montana, located here. It's not very far from either the west or north entrance to Yellowstone National Park. It's 10,840 feet (3304 meters) at the summit.
It looks remarkably different depending on what direction it's being viewed from. I acquired a couple of pictures to illustrate that, which appear below.
Wikipedia informs this about the geology of Spirit Mountain.
"Sphinx Mountain is of interest to geologists as it exposes an unusual formation known as the Sphinx Conglomerate (Eocene) which overlays the Livingston Formation (Late Cretaceous). The conglomerate is found only on Sphinx Mountain and the adjacent peak, The Helmet. It was first identified by geologist A.C. Peale during geological surveys of the region in the 1880s."
It is also a popular hike and climb.



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