"Identification of truly thermal springs is an indispensable aid in the assessment of a region's geothermal characteristics. Over the years numerous lists of thermal springs in Arizona have been compiled and we present yet another. Although the word thermal implies heat, there is considerable subjective or arbitrariness in its application. In geothermal work what is important is anomalous or unusual heat-something above a norm. A functional scheme has been devised that is useful in identifying those Arizona springs judged to be carrying anomalous heat. The method is readily applied to any new springs that may be encountered. The results of this updated version are shown in Table 1. Also, possible heat sources are briefly outlined in the text."

The undersigned , being the executive secretary of the Oil and Gas Conservation Commission of the state of Arizona, hereby certifies that the following is a true and correct copy of the rules and regulations of the Oil and Gas Conservation Commission of the State of Arizona relating to the conservation of geothermal resources, which were duly adopted by this commission by the Title 27, Chapter 4; Article 4. Said rules and regulation have been filed with the office of the secretary of State on the 23rd day of June, 1972.

This Directory has been prepared to identify for easy reference numerous sources of information relating to exploration for Arizona's petroleum and geothermal resources.