GEOLOGICAL SURVEY OF THE TERRITORIES. 165 



which we followed until we reached the point where it enters the middle 

 canon. We then struck up on to the hills, which we found to be composed 

 of granitoid rocks, mostly gneisses. We were unable to get very near 

 the caiion, on account of the rnggedness of the country. We spent the 

 day descending into deep ravines and crossing high ridges. The country 

 is very rough and we had no trail to follow. Several times we thought 

 we might be obliged to turn back. The highest point we reached had an 

 elevation of 8,000 feet. This was on the divide between the Gallatin and 

 the Madison, and we had a good view of the valleys of the Gallatin, 

 Madison, and Jefferson, which lay spread out before us, the relations to 

 each other of the different patches of lake-deposits between the rivers be- 

 ing beautifully shown. In the gneisses over which we were passing, 

 which dip northwest, there are numerous veins of white quartz. In one 

 place I noticed immense masses of it containing a green mica, /«c/mfe 

 which wf»s so abundant that it gave a green color to the entire mass. 

 We camped late in the evening at the head of Pole Creek, which we mis- 

 took for Cherry Creek. In the morning we proceeded down stream, 

 hoping to reach the mines. We found that the gneissic rocks continued 

 for some distance and were succeeded by beds of massive quartzite 

 resting conformably on them. These quartzites are succeeded by sand- 

 stones, shales, and shaly limestones, above which, we find a bed of 

 jasper and flint containing a beautiful variety of specimens. Above this 

 is a bed of limestone. All of these beds are probably Lower Silurian. 

 Eeachiug the mouth of Pole Creek we found that it was a branch of Cher- 

 ry Creek, and we were four miles below the mines. We then turned 

 our horses' heads up stream and reached the mines about noon. We 

 spent two hours examining them, during which time I obtained the follow- 

 ing information : The mines are situated in gneissic rocks of distinct 

 bedding, dipping northeast. All the openings have been made on the 

 side of the hill, which faces toward the south. The first discovery 

 was made at the Havana lode, near the Madison Eiver, some four 

 miles northwest of the present camp, in May, 1872. Next, the Devil's 

 Gate lode was discovered, 3,000 feet southeast of the Havana. In 

 June the discovery was made at the present camp. There has really 

 very little been done, as yet, beyond the stakiug of claims and the be- 

 ginning of shafts into them. I will give the names of the various 

 lodes that I visited, with various points of interest concerning them : 



Eberhardt lode. — This lode was discovered on the 5th of June, 1872. 

 It is three feet in width and strikes north 75° west, dipping north 15° 

 east ; angle, 40°. The walls are gneissic. The gangue is quartz and 

 jasper containing native silver. The assays of the ore are said to aver- 

 age S600 per ton. There are two claims on the lode, one called the 

 Eberhardt Discovery and the other the Eberhardt Extension. A shaft 

 has been sunk in each to the depth* of 15 feet. Not more than four or 

 five tons of ore have been taken from these shafts. Several sales in 

 this lode have been made since its discovery, averaging about $150 

 per 100 feet. 



The Heintzleman lode was also discovered on the 5th of June, 1872. 

 It is above and parallel with the Eberhardt. The strike is north 80° 

 west; dip, north IOC* east; angle, 40°; width, 3 feet. The walls are 

 gneissic; the gangue is the same as in the Eberhardt, containing 

 native silver and pyrites. There are two claims, and two tunnels are 

 being driven into it. One has reached a depth of 25 feet and the other 

 30 feet. The ore is said to average $900 to the ton, none of the assays 

 ever having been less than $300 ; the greatest (a picked specimen) gave 

 a result of $5,670 to the ton. One hundred and fifty feet of this lode 



