Skip to main content
Advanced Search

Filters: Tags: Nevada Professional Paper 162 (X)

31 results (49ms)   

View Results as: JSON ATOM CSV
thumbnail
Crystal Pass limestone exposed in a cliff 15 feet high in sec. 30, T.26, S. R. 59 E., south end of Spring Mountains. Clark County, Nevada. December 12, 1924. Plate 5-B in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Thin bedded dolomite of the Goodsprings formation (upper Cambrian) thrust upon the Aztec sandstone (Jurassic) in northeast corner of sec. 21, T. 22 S., R. 58 E. The contact marks the trace of the Keystone thrust. The curve in the trace is due to local irregularities in the surface and to perspective. Clark County, Nevada. Circa 1921. Plate 14-A, with a graphic, in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Stratum of limestone preserved unaltered in midst of dolomitized limestone 200 feet above the base of the Bird Spring formation in sec. 4, T. 25 S., R. 58 E., the workings of the Hoosier mine lie in the foreground. Clark County, Nevada. Circa 1921. Plate 19-A, labels and a graphic, in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Dolomitized zone (light) in bed of limestone of the Bird Spring formation in sec. 33, T. 25 S., R. 58 E., view taken diagonally downward toward a bedding plane. Dolomitization has progressed outward from a median fracture 4 feet to the right and to the left (limit is shown by head of hammer). Clark County, Nevada. Circa 1921. Plate 18-B in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Keystone mine NW 1/4 sec. 30, T. 24 S. R. 58 E. The slopes back of the mine are made up of thin bedded dolomite of the Goodsprings formation. Clark County, Nevada. Circa 1921. Plate 31-A in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Aztec sandstone overlying Chinle formation in sec. 22, T. 22 S., R. 58 E., the Aztec sandstone is overlain by thin bedded dolomite of the Goodsprings formation from which it separated by the Keystone thrust fault. Compare with Hewett, photo 365. Clark County, Nevada. Circa 1921. Plate 8-B in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Yellow pin mine and camp, NW 1/4 sec. 20, T. 24 S., R.54 E., the slopes of Shenandoah Peak (crest of ridge) are made up of thin bedded limestones of the Bird Spring formation. The porphyry sill underlies the smooth slope behind the hoist. Clark County, Nevada. Circa 1921. Plate 35-A in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Ninety-nine Mine, W 1/2 sec. 15, T. 23 S., R. 58 E., the ridge on the left is made up of limestones near the base of the Bird Spring formation which dip eastward (left). The Ninety-nine fault passes through the ravine in the center. Clark County, Nevada. Circa 1921. Plate 31-B in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Trace of the Keystone thrust west of Goodsprings in the SW 1/4 sec. 29, T. 24 S., R. 58 E; on the right crumpled limestones (now dolomitized) of the Bird Spring from (Pennsylvanian): on the left thin bedded dolomite of the Goodsprings formation (Upper Cambrian). The trace is marked by a reddish zone formed by the oxidation of pyrite the curve is due to relief and perspective. Clark County, Nevada. Circa 1921. Plate 14-B, with a graphic, in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Thin bedded dolomites of the upper part of the Goodsprings formation in secs. 28, 26 and 30, T. 24 S., R.58E: due east from the hill (altitude 5,124 feet west of Kirby Wash toward Columbia Pass and Goodsprings. The town is hidden by the hill in the middle distance. Clark County, Nevada. Circa 1921. Plate 5-A in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Wedge of Bullion dolomite separated by faults from blocks of Yellowpine limestone, view northwest toward ridge west of the Bullion mine in sec. 23, T. 25 S., R. 58 E. Clark County, Nevada. Circa 1921. Plate 15-B, with graphics, in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Potosi mine, south center of sec. 12, T. 23 S., R. 57 E., the mine workings explore a zone at the base of the Yellowpine limestone. Clark County, Nevada. Circa 1921. Plate 33-B in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Supai formation has overlain by the Kaibab limestone east of Cottonwood Pass, in sec. 13 T. 23 S., R. 58 E. The conspicuous sandstone 460 feet thick forms the middle part of the Supai formation. It is overlain successively by gypsum bearing sandy shale at the top of that formation and the two massive beds of limestone of the Kaibab limestone. Potosi Mountain in the distance. Clark County, Nevada. Circa 1921. Plate 8-A in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Arrowhead limestone southeast of the Yellow Pine mine in center of sec. 20 T. 54 S., R. 58 E. Clark County, Nevada. December 13, 1924. Plate 6-B in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Potosi Mountain from the northwest, showing faults, in sec. 5. T. 23 S. R. 58 E; showing relation between Sultan limestone and Goodsprings dolomite. Plate 13-B is a detail sketch of this photograph. Clark County, Nevada. Circa 1921. Plate 13-A, with graphics, in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Northwest toward ridge in S. 1/2 sec. 4, T. 23 S., R. 58 E.; the spur is capped by the sandstone at the base of the Bird Spring formation. The prominent cliff is the Yellowpine limestone, the top member of the Monte Cristo limestone, underlain successively by the Arrowhead limestone, Bullion dolomite and the Anchor limestone members. Clark County, Nevada. Circa 1921. Plate 7-A in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Limestone beds near the base of the Bird Spring formation locally altered to dolomite (white) near the Silver Gem mine in Devil Canyon, in sec. 33, T. 25 S., R. 58 E. Dolomitization has progressed outward (to the left) from a series of minor fractures (largely to the right of the field). Clark County, Nevada. Circa 1921. Plate 18-A in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Contact of intrusive rock of Diablo Grande Peak and limestone of the Spring Mountains; the rhyolite is on the right and the limestones of the Monte Cristo formation on the left. The limestones are bleached and altered to dolomite in a zone 100 to 200 feet wide along the contact. Clark County, Nevada. Circa 1921. Plate 10-A in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Trace of a normal fault in the east half of sec. 27, T. 25 S., R.58 E. Bullion dolomite (light) on the right; Yellowpine limestone (dark) on the left. The Yellowpine limestone is not altered to dolomite. Clark County, Nevada. Circa 1921. Plate 15-A, with a graphic, in U.S. Geological Survey. Professional paper 162. 1931.
thumbnail
Form a panorama of Goodsprings, town and valley, Spring Mountain and Potosi Mountain on the left; Bird Spring Range on the right; taken from small hill in E 1/2 sec. 26, T.24 E., R. 58 E. Clark County, Nevada. Circa 1921. Plate 4-A (frontispiece) in U.S. Geological Survey. Professional paper 162. 1931.