With ~30 high-silica rhyolite domes and flows and a total eruptive volume of ~5-8.5 km3(DRE), the Mono Craters volcanic chain is one of the youngest and most active silicic systems in North America. Effusive products range in age from ~42 ka to 0.7 ka and exhibit changes in mineralogy (biotite-, orthopyroxene-, or fayalite-bearing) and crystallinity through time. Ion microprobe 238U-230Th dating of allanite and zircon surfaces ...
