Arizona Blue Fire Opal claim (Scorpio claims), Oro Blanco District (Ruby District), Oro Blanco Mts, Santa Cruz Co., Arizona, USA
|Latitude & Longitude (WGS84):||31° 29' 30'' North , 111° 10' 9'' West|
|Latitude & Longitude (decimal):||31.49167,-111.16917|
|Other regions containing this locality:||Sonoran Desert, North America|
‡Ref.: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 193.
Arizona Department of Mineral Resources Arizona Blue Fire Opal file.
A former surface opal mine/occurrence located in sec. 25, T.22S., R.11E.
1 valid mineral.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Tortonian - Bartonian|
7.246 - 41.3 Ma
|Middle Miocene to Oligocene volcanic rocks|
Age: Cenozoic (7.246 - 41.3 Ma)
Description: Lava, tuff, fine-grained intrusive rock, and diverse pyroclastic rocks. These compositionally variable volcanic rocks include basalt, andesite, dacite, and rhyolite. Thick felsic volcanic sequences form prominent cliffs and range fronts in the Black (Mohave County), Superstition, Kofa, Eagletail, Galiuro, and Chiricahua Mountains. This unit includes regionally extensive ash-flow tuffs, such as the Peach Springs tuff of northwestern Arizona and the Apache Leap tuff east of Phoenix. Most volcanic rocks are 20-30 Ma in southeastern Arizona and 15 to 25 Ma in central and western Arizona, but this unit includes some late Eocene rocks near the New Mexico border in east-central Arizona. (11-38 Ma)
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.