TY - SER AU - Davis,Linda AU - Smith,Douglas AU - McDowell,Fred AU - Walker,Nicholas AU - Borg,Lars TI - Eocene potassic magmatism at two buttes, Colorado, with implications for cenozoic tectonics and magma generation in the western United States SN - 00167606 N1 - bibliogr. p. 1578-1579 ER -