Bears -- A Geological Force

"Displacement of eroded sandstone by Ursus americanus." I live at the bottom of a steep ridge wtih exposed sandstone rock strata at the top. Pieces fall off Over centuries and millennia huge boulders have rolled partway down and stacked up upon each other. Once while visiting a favorite place, I found new rock shards everywhere and worked out where maybe a dumpster-size piece had come down since…