Mixed-230Th/U formation ages and secondary uranium concentrations of above-water carbonates, and primary uranium concentrations of continuously submerged calcite at Devils Hole, Nevada
For more than a half million years, dense vein calcite has been precipitating in Devils Hole, located about 115 km northwest of Las Vegas, Nevada. This process also occurs in Devils Hole Cave 2, which is hydrologically connected and situated about 200 meters north of the original Devils Hole cave. Calcite has been …