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Diagram showing mountains and valleys due to block faulting in the background, and the dissection of the blocks and filling of the valleys, in the foreground. A stage of maturity has been reached in the development of these mountains.

Block Faulting Results

Diagram showing mountains and valleys due to block faulting in the background, and the dissection of…

Diagram showing block faulting of the checkerboard type; peneplanation of the region, and the development of a complicated topography by erosion in the second cycle.

Checkerboard Block Faulting

Diagram showing block faulting of the checkerboard type; peneplanation of the region, and the development…

The mass consists of crystalline rocks, shown by dots, covered by limestones and other sediments, which originally were horizontal. A single great fault forms the left-hand face of the mountain, which consists of a tilted block, broken into minor blocks by lesser faults.

Block Faulting, Sandia Mountains

The mass consists of crystalline rocks, shown by dots, covered by limestones and other sediments, which…

Diagram illustrating block faulting, and the initial stage in the formation of block mountains.

Block Faulting

Diagram illustrating block faulting, and the initial stage in the formation of block mountains.