Clara and Karen lovingly stroked the unconformity surface. The rock below their
hands is 1.7 billion years old, while the overlying rock on the left side of the picture
is only 500 million years old. The record of 1.2 billion years is missing.

A bunch of us enjoying the view.

On the way out of camp Tuesday morning, we gave the 7th grade class in the next camp site
a 5-minute presentation on the geology of Devil's Lake. They were studying natural history.

We stopped at the LaRue Quarry to check out another exposure of the contact between the quartzite
and the base of the Mt. Simon.

Featuring Cam behind the drawing pad.

Last stop on the trip was Parfreys Glen, a wonderworld of conglomeratic sandstone beds.

How can you tell how they formed?

It was a beautiful place for a discussion, and it felt so nice to be in the sun and out of the wind.

Tim illustrated the stratigraphy using people.

That's it - back to the salt mines in Northfield!

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Page 1 or Page 2 or Page 3 from the trip

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