Index No: NBM051090; Collected By: ; Sample Type: hand sample; Notes: Sheared, re-cemented vein quartz, vugs and fracture surfaces coated with acicular quartz crystals and adularia crystals, 2-foot-thick section of vein center is rich in Mnox, some earthy-green Cuox-staining; vein cuts silicified, sericitized dacite (?). (Sample dated, adularia, 17.5 +/- 0A)