Roger Weller, geology instructor
[email protected] copyright 2011-R.Weller
copper skull-1
Centennial Mine, Centennial,
Houghton County, Michigan
The skull shape is created
when the copper is deposited around
a rounded boulder within a conglomerate. At a later time the
boulder
is weathered away, leaving just the copper.
copper 2932
Photo is copyright free for
non-commercial educational uses.
Just credit photo to R.Weller/Cochise College
from the A.L. Flagg collection