The extraction process to remove the lead from the sulfur is very simple, thus lead has been extracted from Galena since the earliest times.Galena from certain regions is rich in silver, and some specimens may contain as much as 20 percent silver. Because of this, silver-rich Galena is also an ore of silver.
Research shows that hiking has a positive impact on combating the symptoms of stress and anxiety, says Gregory A. Miller, PhD, president of the American Hiking Society. Being in nature is ingrained in our DNA, and we sometimes forget that.
Best Answer: Rough rule of thumb: 120 calories per trail mile hiked plus 120 calories per 1,000 feet altitude gain. You can burn surprisingly few calories in hiking up most easy mountains. Hiking up a 10 mile trail with 6,000' gain will only burn about 1,920 calories.On the other hand, if you climbed the mountain in the hard way, off-trail and with a full pack, you can burn twice as much.Source(s):Scythian1950 Â· 6 years ago.est Answer: Rough rule of thumb: 120 calories per trail mile hiked plus 120 calories per 1,000 feet altitude gain. You can burn surprisingly few calories in hiking up most easy mountains. Hiking up a 10 mile trail with 6,000' gain will only burn about 1,920 calories.