Rockl Identification - Lake Superior Specimen
I collected an interesting rock on the Western side of the Keweenaw Penninsula of the Upper Peninsula of Michigan (Lake Superior). How can I post a picture of it here for ideas on how to identify it? I have several on my Smartphone I could attach somewhere. It looks like a reddish brown potato shaped rock but has some visible banding on the outside, and rings of minerals are visible on one side - looks like white quartz and red quartz in the bands. It is opaque not translucent. The bands have pieces of quartz fractured off - probably from tumbling around in Lake Superior. I thought it might be basalt around a banded quartz of some kind but I am having trouble identifying it. I don't know how to check hardness or streak so I don't have that info handy.
From Judy Buonocore - June 02, 2013 at 22:13:45