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...