I don't know about you but my imagination can work overtime on this rock conglomeration.

Imagine a trickle of water slowly moving inside of granite. As the water comes into contact with a potassium feldspar, a common mineral which is known for the ease with which it reacts with water and hydrogen, a new, soft clay mineral (kaolinite) replaces the feldspar. Kaolinite tends to build up around edges of the granite. There is an abundance of surface area for the clay to build up in because of the abundant joints, or cracks, in the rock. Because the clay is soft, the clay-rich edges of the granite erode and become softer and rounded. Eventually, this process can round out large amounts of rock in strange and picturesque ways. Thin, rounded concentric sheets of rock also have a tendency to peel off in spheroidal masses, making the weathering of this rock appear even more curious.