Spheroid weathering of granite. Spheroidal weathering is a form of chemical weathering. This occurs when concentric shells of decayed rock are successively loosened and separated from a block of rock by water penetrating the bounding joints or other fractures and attacking the block from all sides. It is similar to exfoliation.
Spheroid weathering in granitic rocks. Spheroidal weathering is a form of chemical weathering. This occurs when concentric shells of decayed rock are successively loosened and separated from a block of rock by water penetrating the bounding joints or other fractures and attacking the block from all sides. It is similar to exfoliation.
Cuestas and strike valleys in northern California. A cuesta is an asymmetrical ridge with a long gentle slope on one side conforming with the dip of the underlying strata, and a steep clifflike face on the other side formed by the outcrop of the resistant beds.