Between circa 170 ka and 75 ka, more than 600 km3 of high-silica rhyolite composing the Central Plateau Member (CPM) lavas of the Plateau Rhyolite erupted within the margins of Yellowstone caldera. The compositions of CPM ferromagnesian phenocrysts an . . .

Two sub-reports on a zircon date and a complete chemical analysis of the collected sample.