The gulch contains an ore vein thick containing pyrite, located a mile ( 1.6 km ) south of the Union Gulch Mine.
12.
"' Coloma "'is a ghost town located in the area of the ore veins were conducted, apparently without success.
13.
"' Stopes "'( areas where ore was removed ) usually follow the ore vein and are often at steep angles to horizontal.
14.
He described prospecting for ore veins and surveying in detail, as well as washing the ores to collect the heavier valuable minerals, such as gold and tin.
15.
The trend-based exploration caused the workings to be developed in northwesterly trend because of numerous secondary ore vein bearing veins in the footwall of the silver vein.
16.
Once the ore body has been identified a shaft is sunk in the vicinity of the ore veins, and crosscuts are driven horizontally to the veins at various levels, usually every 100 to 150 metres.
17.
They could then attack the ore veins by fire-setting, quench with water from a tank above the workings, and remove the debris with waves of water, a method still used in hydraulic mining.
18.
Evidence of the lead mining can still be seen from the remains of the 18th century practice of'hushing'that involved creating turf dams across gills that were then released to wash away topsoil to expose the ore veins.
19.
On 26 Feb ., his journal noted he put his men to work so that the " pit could be cleaned out and examined to see if any ore veins could be found ", " a tremendous stratum of ore was observed ", and he named the pit of " almagre"
20.
Also during these tours, tourists are given a feel of being a miner, by including a stop at a gold ore vein where tourists use a single-jack ( one-handed ) hammer and chisel ( provided ) to chip a gold ore sample loose, which they are allowed to keep as a souvenir.
