Introduction -- Cones and flows of questionable recent age -- Volcanic history of the Sand Mountain Lava Field -- Eruptive rocks from Inacessible alignment and Twin Craters -- Hoodoo Butte -- History of the Belknap Volcano -- Blue Lake Crater -- The Spatter Cone Chain -- Sims and Condon Buttes -- Volcanic history of Yapoah Cone and related vents -- Volcanic history of Four-in-Once Cone and related vents -- Volcanic history of Collier Cone -- Continuity in the volcanic record -- Acknowledgment -- Glossary of selected terms -- References