Wonderland of Rocks Traverse Professional Review and Guide
"More than a hundred million years ago, a molten mass of rock lay several miles underground, cooling and crystallizing by agonizingly slow degrees. As the mass solidified, it contracted slightly, and fractures developed within it. Over geologic time, this mass moved upward while older, overlying layers of rock were eroded away. As the younger rock neared the surface, groundwater seeping into the fractures chemically transformed some of the rock crystals into clay. Large, more-or-less rectangular blocks of rock with rounded corners became isolated from each other in a matrix of loose clay. Once exposed above the surface, the clay quickly washed away, leaving open crevices between the blocks. Various mechanical forces and chemical weathering further chipped away at the boulders and rounded them even more."