BARE MOUNTAIN SARCOBATUS FLAT. 
range near the mouth of a deep canyon. The principal development 
work is a 50-foot shaft. Quartz veins and stringers reaching a maxi- 
mum thickness of 1 foot cut limestone and schist. Some of the veins 
strike east and west and dip 45° S. Chalcopyrite in grains up to on< 
half inch in diameter is disseminated through the quartz. Malachite 
and a little azurite stain the quartz around the sulphide and have 
been deposited in cavities in the quartz. The quart/ vein since its 
deposition has been faulted and crushed, the fragments being in places 
cemented by granular gypsum, while gypsum crystals line some cav- 
ities. The ore of this mine is said to run high in silver, with low gold 
values. 
The two 50-foot shafts of the Kismet Mining Company, better 
known as the Lonsway property, are situated on the crest of a high 
ridge H miles southwest of Beatty. The country rock here, a quartz- 
ite, strikes N. 35° W. and dips 15° NE. The quartz vein, which is 
traceable for several hundred feet, is from H to 2 feei wide and strikes 
N. 85° W. and dips 55° S. The quartz has a sparry texture and is 
white except at the surface, where it is heavily stained by limonite 
and hematite. This vein is said to have been locally charged with 
gold, probably derived from pyrite which occurs with limonite in 
quartz at the bottom of the shaft. The quartzite near the vein is 
sheeted. Silver ores with purple-fluorite gangue occur at the Lige 
Harris prospect. In other portions of the range the quartz veins con- 
tain galena cubes. 
The quartz and associated sulphides were deposited in open east- 
west fissures, possibly by granite magmatic waters. Later the veins 
were faulted and crushed, and surface waters have more or less com- 
pletely altered the sulphides to oxides and carbonates, forming free- 
milling ores. 
The mines on Bare Mountain are controlled by practically the same 
economic conditions as those of the Bullfrog district. Good water can 
be obtained in the springs of Amargosa River one-half mile away. 
The most accessible wood is that of the Amargosa Mountains, 25 
miles distant, The mines are 1 to 3 miles from the proposed rail- 
road to the Bullfrog district. 
SARCOBATUS FLAT. 
Sarcobatus Flat lies west of Pahute Mesa and east of the Amar- 
gosa Range and Slate Ridge. It is one of the largest valleys in the 
area surveyed, being 32 miles long and having an average width of 
10 miles. It has very gently graded slopes. Near its center, at an 
elevation of 3,950 feet, is a large playa. and two small playas lie in 
the arm of the valley south of Tolicha Peak. The surface of 
larger playa is slightly roughened by erosion, but the total difference 
of altitude over the entire flat is probably less than 20 feet. A few 
