Copper Photos
Cochise College               
Photos of Minerals
Virtual Geology Museum      Hall of Minerals

Geology Home Page

Roger Weller, geology instructor

wellerr@cochise.edu     copyright 2008-R.Weller 

 
copper sheet in rock
Keweenaw Peninsula, Michigan
In this specimen, a thin sheet of copper projects out of a rock.  How did it
form?  The rock came first; it was then cracked by tectonic forces.  Copper
was injected into the thin, small opening formed by the crack.  Later, the rock
was exposed during the mining process and the two pieces of rock broke
away, leaving the sheet of copper that had filled the crack.
 

copper
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.