Chilkat Valley News - Serving Haines and Klukwan, Alaska since 1966

Mining advances civilization

 

May 9, 2019



How important is mining for civilization? Thousands of years ago copper ore was work hardened to form crude tools. Much later copper was alloyed with tin ore to produce bronze, a semi-hard metal that could be cast into agricultural tools, gears, b...



For access to this article please sign in or subscribe.










 
 

Powered by ROAR Online Publication Software from Lions Light Corporation
© Copyright 2019