‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 192-193.
The Salero area joins the Josephine Canyon area on the south, extending in a belt about 3 miles wide southward for 6 miles to the south line of T.21S., R.14E., near the Grosvenor Hills. It lies mostly near the eastern border of this township and includes in its southern part the historic Salero camp and mine.
The topography of the area is mountainous in the eastern part. Elsewhere it is mostly rough and hilly, but the western middle part, centering about Wise's ranch is comparatively open. It is drained principally by an eastern branch of Josephine Canyon, known as Ash Canyon, whose head tributaries reach to the ends of the belt on the north and on the south. A narrow portion of the belt on the east drains southward through Squaw Gulch into Sonoita Creek.
The central part of the belt, about 1½ miles wide, with the north-south township line near its middle, is occupied by diorite and quartz monzonite, which on the west are overlain by Tertiary volcanic rocks - quartz latite porphyry, dacite, rhyolite, and andesite - and to the southeast, on Squaw Gulch, are succeeded by a north-south belt of intrusive granite porphyry. The mineral deposits occur in veins which strike WNW and are contained mostly in the quartz latite porphyry, diorite, and quartz monzonite.
The area contains a half dozen mines and a score or more of good-looking prospects.
