RE:RE:RE:RE:RE:RE:RE:RE:RE:Re Oh myThat is a great question winr88, I am a rock hounder not a geologist and have some great finds in minerals crystals and a few fossils, however my answer might be wrong although its from my personal experience. When I look at Red Hill and Aster I see over millions of years one of two possibilities the first is rain, wind and flood erosion out of Red Hill left deposits into Aster. The second thought the geological event that caused Rhyolite Domes in Nevada and Arizona might have also spewed gold into the immediate area around those domes. Perhaps Greg Hahn could elaborate on this subject! Great question although I think more AU gpt under the Dome.