Huckleberry, Gary, 1993, Surficial geology of the middle Gila River area, north-central Pinal County, Arizona [Florence, Florence SE, North Butte, Grayback, and Teapot Mountain 7.5 min]: Arizona Geological Survey Open-File Report 93-03, 52 p., 5 sheets, scale 1:24,000. Location: Florence area, Donnelly Wash area, Tortilla Mts., Mineral Mtn. area, Ray area,