Thursday, April 26, 2012

Rocks Close Up

Yesterday I was way too busy to get out and exercise. So for today's blog posting, I am going to include a few close up photographs of Lake Superior beach rocks. These are pictures I will be including in the online rockhounding adventure on beach rocks.


We will begin with igneous intrusive (cooled inside the Earth) -- granite.


Closer....



Closer.....



Extrusive igneous (cooled on the surface of the Earth) basalt.



Closer....


Closer....


Igneous rhyolite that formed from material ejected in a volcanic pyroclastic flow.

Closer....


Closer....


Munising formation sandstone....



Doesn't it look like Lake Superior beach sand?


Jacobsville sandstone (1 billion years old)...


Closer...


Munising formation sandstone....


Closer...


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