These amazing granite boulders, known as Tors, are common in this area and litter the landscape as if randomly placed by giants. They range in size from small rocks to huge monoliths, many showing interesting placement.
Tors begin their life as molten rock, which cools underground. Over a long period of time, movement and faulting cause cracks to form in the rock and water seeps in. The water weathers the sides of the rock taking off the sharper edges and making the blocks rounder.
Much of this weathering takes place underground, then wind and water erode the landscape eventually exposing the boulders. As the surrounding soil disappears, the tors are left behind looking like marbles and building blocks left by giants.
The weathering process speeds up once the tors are exposed to air, with thin layers of rock peeling off the boulders like layers from an onion. The granite rock consists of silica (sand), mica and feldspar.
Taken on a friend's farm at Oberon in the NSW (Australia) Central Tablelands. This is a different and much closer view of 'The Rock'.
This is a 7 exposure (+/- .7) HDR created in Photomatix Pro.