LITTLE GIANT MINE. 425 



by narrow sinuous drifts with the fifth level of the Carbonate. The ore is 

 iron-stained sand carbonates, occurring, as a rule, in thicker bodies than in 

 the Carbonate claim and being rather more irregular in shape. The work- 

 ings consist of a main incline, now being driven a little south of east from the 

 bottom of the shaft, and of an incline running nearly due east at an angle 

 of 26^, from which levels have been run off at intervals of about fifty feet. 

 The richest ore bodies have been found intimediately adjoining the Car- 

 bonate claim on one side and that of the Yankee Doodle on the other. 

 The larger portion of the ground included in the Little Giant claim, which 

 , lies to the southwest of the Shamrock, has not been prospected at all, be- 

 cause it has been considered beyond the southeastern limit of the pay ore 

 streak, as indicated on the map. The ground is probably barren. 



Yankee Doodle. — The Yankoo Doodle mine, east of the Carbonate fault, is 

 opened by two independent shafts, not yet connected underground, and the 

 present developments are confined to the workings from the upper shaft. 

 The ore found here is a northeastern continuation of the Carbonate body. 

 The upper shaft of the Yankee Doodle is 303 feet deep, the first station 

 being at a depth of 296 feet from the surface. Limestone is sa,id to have 

 been struck in this shaft at 230 feet. The main drift, running eastward 

 from the station, is cut in solid black crystalline limestone, showing some 

 replacement action; but no pay ore is found until the first cross-drift is 

 reached, at a distance of 170 feet from the shaft.^ Twenty-five feet beyond 

 this first drift is a winze 30 feet deep, which goes down at an angle of 70° 

 to the eastward, following a sudden bend in the limestone, which is evi- 

 dently the same that has been traced through the Carbonate and Little Giant 

 claims, though having a steeper angle. Some ore has been found beyond 

 the bend on either side of the main drift, but none as yet below the winze. 

 The principal ore developments have occurred along the boundary line 

 between this claim and the Little Giant, where an incline is being sunk at 

 an angle of 30°. Considerable ore was found extending upwards along the 

 surface of the limestone near the boundary line. These developments show 

 a somewhat discontinuous body of pay ore, consisting of sand carbonates 



■By an oversight iu the correction of proof the section (Section GG, Atlas Sheet XXX) shows 

 White Porphyry, instead of vein material, below this drift from this point to the winze. 



