COLLECTIONS IN ECONOMIC GEOLOGY AND METALLURGY. 95 



About 1-! feet ot coiigioineratc of moderate size and soinewliat uiii- 

 loriu pebbles follow the contact, some of the layers being more oi)eu 

 than others : 



(1) Conj^lomerate, from an open layer. (54(557.) 



(2) Conglomerate, from a compact layer, sbowinj^ one of the slii>.s or fissures so 

 common in the mine, which has faulted the bed hero 5 or 6 inches. (.54670.) 



(3) Conglomerate, irregular sized pebbles with free cojjper in the c(imeuting ma- 

 terial, from a 10-inch layer. Shows the generally looser structure of the cupriferous 

 layers. (54GS5.) 



(4) Conglomerate, containing very large pebbles, from a 7-foot layer. (.546G4.) 



(5) Conglomerate, compact, from a 2-foot layer, 21 feet from the hanging wall. 

 (54654.) 



(6) Conglomerate of large sized pebbles, with considerable free copper, from a 4-foot 

 layer, 23 feet from the Iianging wall. (5465(5.) 



(7) Conglomerate, 27 feet from hanging wall and 3 feet from foot wall. (54676.) 



(8) Amygdaloid, from a boulder in the conglomerate just above the foot wall. 

 (54(J'J3.) 



A section of the beds continued below the conglomerate is shown by 

 an adit level of the uorthwcjstern vein : 



(1) Trap rock, amygdaloidal at the contact. (54(571.) 



(2) Trap rock, amygdaloid, 39 feet from contact. (54662.) 



(3) Trap rock, amygdaloid, 66 feet from contact. (54704.) 



(4) Trap rock, amygdaloid, 'JO feet from contact. (54(575.) 



(5) Trap rock, amygdaloid, 159 feet from contact. (54700.) 



(6) Trap rock, amygdaloid, 270 feet from contact. (54678.) 



(7) Trap rock, amygdaloid, 10-foot bed, 294 feet from contact. (54655.) 



(8) Trap rock, amygdaloid, 306 feet from contact. (54724.) 



(9) Trap rock, amygdaloid, 474 feet from contact. (54653.) 

 (10) Trap rock, amygdaloid, 594 feet from contact. (54701.) 



The western ore body is illustrated by the following specimens taken 

 from a stope halfway between the adit and No. 1. level : 



(1) Free copper, with a little calcite, shows the impression of several pebbles, 

 and illustrates the occurrence of the copper as a cementing material. (54669.) 



(2) Conglomerate, with much free copper, from a 12-inch layer, 7 feet from the foot 

 wall, very loose in texture. (54698.) 



(3) Calcite, the filling of one of the fissure veins. (54697.) 



(4) Conglomerate, a large pebble showing calcite on several sides. (54703.) 



A section of the bed 75 feet west of the second shaft at the seventh 

 level is as follows : 6 inches of sandstone showing ripple marks, 4 feet 

 of compact conglomerate, Giuch layer of open cupriferous rock, 2 feet 

 of compact conglomerate, IS-inch layer of very rich rock, i feet of com- 

 pact conglomerate. This section is illustrated by samples taken east 

 of the shaft : 



(1) Sandstone, showing north and south ripple marks. (54690.) 



(2) Couglomerate, compact and barren. (.54(594.) 



(3) Couglomerate, with free cop|)or, from the (5-inch layer. (54731.) 



(4) Conglomerate, with much free copper, frcun the 18-inch seam. (.546(56.) 



(5) Trap rock, slightly autygdaloidal, from the foot wall. (54658. ) 



