mining news

Magnification of the south-central mapping portion, showcasing Kingman, Arizona, home to the Bimetal Mine.

Map of the Month: April 2023

Our April Map of the Month is this 1907 map of the American Southwest titled, the ”Greatest Mineral Belt in the World”. The map depicts the breadth of gold, silver, and copper through the mineral belt...

A magnified view of the Durango and Rio Grande Railroad lines. The Durango rail is represented by a black line with white dots, while the Rio Grande is red with white dots. Major cities like Colorado Springs, Denver, and Durango are bold, while surrounding cities are smaller in size.

Map of the Month: June 2022

Our June Map of the Month is a 1905 “Map of the Denver & Rio Grande System” depicting the extent of the Denver and Rio Grande Railroad at the time as well as its connecting lines and variation in ...