Geologic map of the House Mountain shield volcano of the North Verde volcanic field of the Verde Vally. Field-based geologic mapping has identified one large central volcano and 84 small volcanoes and intrusions in an area of 180 mi2 (470 km2) on and near the Mogollon Rim in the north part of Verde Valley, Arizona. Geographic coherency of the volcanic structures and alkaline lava compositions that are markedly undersaturated in silica characterize this volcanic terrane, which, informally, is named the north Verde volcanic field.
Online resource: Holm, R.F., 2016, The North Verde Volcanic Field, Verde Valley, Arizona.. Arizona Geological Survey Contributed Report, CR-16-E, 31 p. and 6 appendices. http://repository.azgs.az.gov/uri_gin/azgs/dlio/1687