Page 204 - The Geology and Ore Deposits of Sierra County, New Mexico - Bulletin 10

200 GEOLOGY AND ORE DEPOSITS OF SIERRA CO., N. M.
end of the range has been depressed by the movement along the fault east and south of Hot Springs, and the rocks have been broken into four long, narrow slices, by north-south faults, and each slice has been lowered and dragged under, relatively to the one west of it. Upturning of the beds on the east side of these faults is a marked feature, especially near the northern end of the range, where the amount of movement has been greatest. The fault separating the granite and the Paleozoic rocks has a vertical displacement of not less than 600 feet. The upturning of the Paleozoic beds at this point
has been well illustrated by Darton. 64 Farther east, faulting of the same type has occurred, and at the north end of this break Abo sandstone has been dragged down and under the Magdalena limestone of the west wall. Farther south along this fault, Mag- dalena limestone is the surface rock on both sides. The displace- ment decreases in this direction, and the fault ends in a simple monoclinal fold in the Magdalena beds. Along the third fault to the east, the east side has been relatively depressed, with the result that Cretaceous rocks are adjacent to the Abo sandstone and Chupadera formation.
. 64Darton, N. H., op. cit. (U. S. G. S. Bull. 794), Plate 61 b, p. 320.