Geology topics
Research about Cochise County, Arizona
Source-linked reports with geographic coverage including Cochise County, Arizona.
Mineral resource potential of the Winchester Roadless Area, Cochise County, Arizona
No abstract available.
Maps showing ground-water conditions in the Douglas Basin area, Cochise County, Arizona: 1978
The Douglas basin area includes about 1,200 square miles in southeastern Arizona. The main use of ground water is for irrigation. For 1955-77, the estimated ground-water pumpage equaled or exceeded 50,000 acre-feet per year, and for 1966-77, the ground-water pumpage averaged about 109,000 acre-feet per year. Ground-water withdrawals have resulted in water-level declines in most of the area. Information shown on the maps includes change in water level (1966-78) and irrigated area; depth to water and altitude of the water level; and chemical quality of the water and well depth. Hydrographs of the water level in selected wells and a table of historical pumpage also are included. Scale 1:125,000.
Maps showing ground-water conditions in the San Bernardino Valley area, Cochise County, Arizona -- 1975
Arizona is divided into 67 ground-water areas, and individual areas are selected for intensive data collection once every 6 years. The data collected in the San Bernardino Valley area are given on maps that show depth to water, well depth, and altitude of the water level; and dissolved-solids and fluoride concentrations, 1974. Scale 1:125,000. (Woodard-USGS)
Aeromagnetic map of parts of the Chiricahua Peak and Portal quadrangles, Cochise County, Arizona
No abstract available.
Preliminary geologic map of the Happy Valley quadrangle, Cochise County, Arizona
No abstract available.
Aeromagnetic map of parts of the Willcox and Luzena quadrangles, Cochise County, Arizona
No abstract available.
General geology of central Cochise County, Arizona, with sections on age and correlation
No abstract available.
Distribution of uranium in the Bisbee district, Cochise County, Arizona
The Bisbee district has been an important source of copper for many years, and substantial amounts of lead and zinc ore and minor amounts of manganese ore have been mined during certain periods. The copper deposits occur both as low-grade disseminated ore in the Sacramento Hill stock and as massive sulfide (and secondary oxide and carbonate) replacement bodies in Paleozoic limestones that are intruded by the stock and related igneous bodies. The lead-zinc production has come almost entirely from limestone replacement bodies. The disseminated ore exhibits no anomalous radioactivity, and samples from the Lavender pit contain from 0.002 to less than 0.001 percent equivalent uranium. The limestone replacement ores are distinctly radioactive and stoping areas can be readily distinguished from from unmineralized ground on the basis of radioactivity alone. The equivalent uranium content of the copper replacement ores ranges from 0.002 to 0.014 percent and averages about 0.005 percent; the lead-zinc replacement ores average more than 0.007 percent equivalent uranium. Most of the uranium in the copper ores of the district is retained in the smelter slag of a residual concentrate; the slag contains about 0.009 percent equivalent uranium. Uranium carried off each day by acid mine drainage is roughly equal to 1 percent of that being added to the slag dump. Although the total amount of uranium in the district is large, no minable concentrations of ore-grade material are known; samples of relatively high-grade material represent only small fractions of tons at any one locality.