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The Arizona Geological Survey (AZGS) was established by the Arizona Legislature to investigate and describe Arizona's geology and to educate and inform the public regarding its geologic setting. Each year since 1915, AZGS has released geologic maps, formal reports, and other geology-related publications.
Arizona is known as the Copper State because it produces two-thirds of US copper annually. Laramide copper porphyry deposits are common around Tucson and include the Twin Buttes, Sierrita-Esperanza, Rosemont, Silver Bell and Mission-Pima mines, as well as the historical Ajo mine to the west.
The Gila Group is a group of geologic formations found along the upper tributaries of the Gila River in Arizona and New Mexico. [1] Radiometric dating of lava flows within the group yields an age of Miocene to Quaternary .
When deposition resumed, it was widespread and voluminous. As a result, the Esplanade Sandstone is the thickest and most widespread formation of the Supai Group, extending into southeastern Arizona [16] and southwest Utah. [17] The Esplanade consists of up to 850 feet (260 m) [18] of fine-grained, distinctively cross-bedded sandstone. [19]
Peach Spring, Arizona Geologic Map and Cross Section of the Silver Creek Caldera in Oatman, Arizona. The Peach Spring Tuff is a pyroclastic flow sheet deposit spanning 32,000 km 2 in California , Arizona , and Nevada .
In the Arizona ecoregion section, the Arizona transition zone is the major section of the EPA designated, Level III ecoregion, Arizona/New Mexico Mountains ecoregion. The other two outlier subregions to the transition zone in Arizona, are the Kaibab Plateau of the North Rim of the Grand Canyon , and associated ranges of the Chuska Mountains ...
The geology of New Mexico. A geologic history: New Mexico Geological Society Special Volume 11. pp. 95– 136. ISBN 9781585460106. Lawton, T.F.; Olmstead, G.A. (1995). "Stratigraphy and structure of the lower part of the Bisbee Group, northeastern Chiricahua Mountains, Arizona". Geological Society of America Special Papers. 301: 21– 39.
The Unkar Group is a sequence of strata of Proterozoic age that are subdivided into five geologic formations and exposed within the Grand Canyon, Arizona, Southwestern United States. The Unkar Group is the basal formation of the Grand Canyon Supergroup .