148 EEPOET UNITED STATES GEOLOGICAL SUEVET. 



certain rules, within restricted areas. Wliat vre have learned "with 

 regard to the character, association, and distribution of the lodes of the 

 Shoshone and Miner's Dehght districts entitles us to the oinnion above 

 expressed. 



IRON. 



The most important deposit of iron within our district is found near 

 Eawlings Springs. About two miles north of the town is located what 

 is known as the Bed Paint Mine. This is an open quarry in an extensive 

 deposit of red hematite. Its commercial A^alue, either as paint, flux, or 

 ore, renders it of importance. Along the line of the Union Pacific Rail- 

 road a number of such deposits have been found, and they are utilized 

 for the purposes above mentioned. The hematite at Eawlins is con- 

 tained in a Palaeozoic series. It is remarkably pure and free from quartz. 



In the main chain of the Wind Eiver Mountains a number of veins 

 were observed in the granite containing specular hematite. Usually this 

 is associated with chlorite and some hornblende. From the thickness of 

 a knitting-needle the seams containing this mineral widen out to veins 

 of several feet. Interesting as these occurrences are, the demand for 

 iron will never be sufficiently great to give them any value. 



A few miles south of Atlantic City a vein of siderite is located. It is 

 known as HeyroWs lode. Traversing the schists, this lode maintams a 

 width of from 2 to 4 feet. The siderite is changed into hmonite near 

 the surface, but lower down is not decomposed. It contains an admix- 

 ture of clay, which renders it somewhat impure. 



At several localities within the Cretaceous and younger groups, small 

 deposits of hmonite were seen. They are parallel to the stratification, 

 and will scarcely ever prove to be of any value, "llidney-ore" was 

 found in the Post-cretaceous series, associated with coal. 



GE,APHITE. 



ISTear Miner's Delight a vein containing graphite is said to be located. 

 Without obtaining a guide, I endeavored to find it, but failed. Not hav- 

 ing been able to see any of the specimens said to occur in this vein, I 

 am unable to give any oj)inion upon it. Persons who have seen them 

 assure me that it "writes as well as a lead-pencil." This may or may 

 not be regarded as a crucial test. So far as I could understand, the 

 supposed vein is found in the metamorphic rocks of that region. 



COAL. 



A large poi^tion of the area surveyed shows the Lignitic formation of 

 the West. At a number of places along the Union Pacific Railroad, 

 openings have been made from which coal was obtained. Near Eaw- 

 hngs Springs is one mine w^hich is worked during a portion of the year 

 at least. Farther west there are others which now are abandoned. The 

 extensive vems near Point of Rocks, Evanston, and other places, supply 

 the demand, and no chance remains for individual enterprise along the 

 line of the road. Numerous outcrops were observed, some of them indi- 

 cating veins of considerable size. North of the Sweetwater Hills I saw 

 no workable beds, although it is claimed that some have been discovered. 

 The coal found within our district is of that variety which is generally 

 termed "lignite." It is of good quality for ordmary i)urposes, and is 

 extensively used west of the Missouri River. Certain banks contain 

 less ash than others, and again beds may be found that will form a hard, 



