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Granite domes are domical hills composed of granite with bare rock exposed over most of the surface. Generally, domical features such as these are known as bornhardts. Bornhardts can form in any type of plutonic rock but are typically composed of granite and granitic gneiss.[1] As granitic plutons cool kilometers below the Earth's surface, minerals in the rock crystallize under uniform confining pressure. Erosion brings the rock closer to Earth's surface and the pressure from above the rock decreases; as a result the rock fractures. These fractures are known as exfoliation joints, or sheet fractures, and form in onionlike patterns that are parallel to the land surface. These sheets of rock peel off the exposed surface and in certain conditions develop domical structures.[2] Additional theories on the origin of granite domes involve scarp-retreat and tectonic uplift. One hypothesis is that granite domes are uplifted blocks. This is the case with some granite domes but the fracture related exfoliation joints are what controls the steep slopes. Another theory that regards isolated bornhardts is that they remain after long-distance scarp recession. Moisture related weathering is what causes scarp recession. In the case of granite in a dissected landscape the dry granite high on a slope remains stable and acts as caprock. Granite below this is more easily weathered and eroded because it has been exposed to moisture and has weathered. This ultimately leads to the steepening of the slope and the collapse of higher slope elements as well as the maintenance of scarps of essentially constant inclination and morphology during backwearing.[4] ~ Source Wiki HFF YE ALL, HAVE A GREAT FRINDAY, AND THE WEEKEND