the most gold was found in the united states at nevada.
the most gold was found in the united states at nevada.
where was the most gold found in the united states?
nevada
the nixon fork mine is an underground lode gold-copper mine located northeast of mcgrath, alaska. placer gold was discovered nearby in 1917, by 1918 hardrock mining was underway, and continued intermittently until 1964. ore consists of shoots of massive sulfides and native gold found with skarns along the contact of sedimentary rocks and the mystery creek quartz monzonite stock. the mine was reopened for exploration, permitted, and developed by nevada goldfields, inc. in 1995 and operated until 1999. in 2005 resource and exploration development resumed. gold production occurred in 2006 and 2007, production is currently suspended. production has totaled 187,000 ounces of gold, 2,190,000 pounds of copper, and at least 11,000 ounces of silver. two small ore bodies have proven and probable reserves of approximately 126,400 tonnes, containing 133,730 ounces of gold. an additional 116,000 tonnes of existing mill tailings are reported to contain 30,200 ounces of gold.
gold mining in alaska
in calm weather, a layer of significantly warmer air may rest over colder dense air, forming an atmospheric duct that acts like a refracting lens, producing a series of both inverted and erect images. a fata morgana requires a duct to be present; thermal inversion alone is not enough to produce this kind of mirage. while a thermal inversion often takes place without there being an atmospheric duct, an atmospheric duct cannot exist without there first being a thermal inversion.









































section::::observing a fata morgana.
fata morgana (mirage)