This is the rock formation called Casa Grand. That translates to "big house" which is not very poetic. I like "Casa Grande" better. The top of the formation is 2000 feet above the ground I am standing on. This kind of rock formation is called a "volcanic plug." Eons ago this land was covered with earth, and there were vents - openings - on active volcanoes. Molten lava forced its way up unto the vents, and then it cooled. Over time the softer ground was eroded by weathering, and now the volcanic plug is exposed. Cool, huh?
1 comment:
I like the sun highlighting the "dome". Nice photo! betsey
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