This compilation results from a joint effort between the Arizona Bureau of Mines, University of Arizona, Tucson, and the Arizona Oil & Gas Conservation Commission, Phoenix, Arizona. It serves as a basic data companion piece to Arizona Bureau of Mines Bulletin No. 182 "Coal, Oil, Natural Gas, Helium, and Uranium in Arizona," and the Arizona Oil & Gas Conservation Commission's "Index of Well Samples." It represents the first attempt, in Arizona', to produce a compilation of geologic data acquired from studies of exploration holes drilled through 1971 principally in search of oil, natural gas, and helium. However, also included are selected holes associated with mineral (principally non-metals) and water exploration and development.