POTD: Makoshika #8

POTD: Makoshika #8Makoshika #8 Makoshika State Park, Montana 2014

This combination of a hard rock layer sandwiched between two soft layers of sediment is the source material for the balanced rocks and similar features in Makoshika. That a balanced rock is formed when the softer material washes away except underneath a chunk of rock is easy to understand. What determines when that happens instead of just the less interesting breaking and crumbling seen here is a mystery to me.]]>