From the looks of it the big rock in the foreground came from the bluff in the background. Wind and water continue to erode the sandstone beneath the rock and I am sure it will once again continue its path down the hill.
Fortunately I had some great cloud cover for this image. This was a 3-photo HDR that was tonemapped in Photomatix Pro. Nik Software's Viveza 2 and Color Efex Pro 4 were used to complete the processing, along with some edits in Photoshop.
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