Papoose Flat intrusive suite
Papoose Flat intrusive suite
Late Cretaceous, ~83 Ma
Located in the White Mountains. Biotite quartz-monzonite with large (up to 5 cm long) K-feldspar crystals and primary muscovite common. Major plutons: Granite of Papoose Flat, and Birch Creek pluton to east of study area. Biotite K-Ar dates of about 75-81 Ma (Kistler and others, 1965; Evernden and Kistler, 1970) and U-Pb monazite age of 83 Ma (Miller, 1996; Saint-Blanquat and others, 2001). The Papoose Flat pluton is discussed in detail by Sylvester and others (1978) and Saint-Blanquat and others (2001).