The Arizona Transition Zone, sometimes referred to as the Central Highlands, is a northwest-trending belt or escarpment in the middle of the state that separates the Colorado Plateau to the north from ...

Arizona has a decades-long unchallenged reputation as a copper state, but a recent ranking suggests more mineral wealth is hiding beneath its deserts. The study, published by Bullion dealer SD Bullion ...

As the Arizona Trail winds past the proposed Oak Flat copper mine, the search for climate solutions takes on new meaning.

Travelers — many inspired by Jacob Waltz — headed to Arizona in search of gold. The Superstition Mountains loom in the background of a historical marker honoring their route. (Joe Duhownik/Courthouse ...

Formed 25 million years ago and involving violent steam-blast eruptions caused by magma pressure deep within the earth, the Superstition Mountains are a collapsed volcanic caldera. Several gold ...

The United States Bureau of Land Management approved a new gold mine project near Wickenburg. The project raised environmental concerns regarding water usage, potential groundwater contamination and ...

The U.S. Geological Survey has transformed how the nation understands its mineral wealth. The agency's 2025 assessment reveals $2.55 trillion in identified and undiscovered gold deposits beneath ...