1. Lower Mesozoic extrusive rocks in southeastern Arizona : the Canelo Hills Volcanics Author/Creator: Hayes, Philip T. 1923- (Philip Thayer) Publication/Creation: Washington [D.C.] : U.S. G.P.O., 1965 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1193-1194. Access & Availability: Loading