736 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Gold. Occurs granular, laminated, in quartz, and sometimes in toler- 

 ably^ large nodules in the placer mines at Tuscarora. Much of the 

 larger sized are porous or cellular ; one specimen of this character, 

 measuring two inches in longth, one in width, and over half an inch 

 in thickness, was worth but $11.50. The outer surface was worn 

 smooth, giving it the appearance of a solid nugget. 



At Silver Peak, in quartz ; sometimes in delicate arborescent forms, 

 sometimes resembling frost-work in construction ; also occurs in 

 ^alenite {q. v.). 



At Gold Mountain in metamorphic rocks. Frequently in variously 

 tinted quartz. One fiber was found to run clean through a small 

 nodule of malachite, and resembled native copper in its filiform variety. 

 Five miles northwest of Gold Mountain, in the " State Line Ledge", 

 is an exposure of auriferous quartz, 20 feet thick and over 2,000 feet 

 in length, running northwest and southeast. Mr. Shaw, of Gold 

 Mountain, stated that an analysis gave about $20 per ton of ore ! At 

 the same time he was one of a party of three who were contented, 

 apparently, in working " ten-dollar ore ". 



The total absence of water may account for their not having worked 

 this quartz. 



In Green Mountain District, at the head of Tule Caiion, gold was 

 found in the sand in large coarse grains. 



Gold is found in many of the silver-ores throughout the State, in 

 various quantities, but seldom sufficient to work it to the exclusion 

 of silver. 



GrapMte. Ten miles northwest of Gold Mountain. 



Gypsum. See Selenite. 



Halite. In small crystals in the desert south of Columbus ; in fine tab 

 ular crystals and cubes in the salt marsh near Silver Peak ; in large 

 cubes, crusts, and eiSorescences in Death Valley ; as an efflorescence 

 on the banks of Eio Virgen, Black Caiion, Colorado River, and in Dia- 

 mond Creek on the Arizona side of the Colorado. In large masses 

 and cubes at Hyko ; abundant at Salt Mountain, near Rio Virgen, in 

 the southern part of the State. 



HalotricMte. Locality unknown. 



Hematite. Ocherous and porous at Lone Mountain. Sparingly at Bull 

 Run and Morey. Occurs in Virgin Caiion, Colorado River, frequently 

 associated with small quantities of the carbonates of copper. Eight- 

 een miles southeast of Silver Peak in occasional croppings. 



Hornblende. Found in small crystals at Gold Mountain. In rhyolite 

 at Carlin, Eureka, and near Morey. Ten miles west of Mount Magru- 

 der in fine crystals. 



HUbnerite. In fine columnar masses from the White Mountains. Aus- 

 tin. 



Iodide of silver. See lodyrite. 



