Tuesday, March 3, 2009

March 7 field trip

This is Paul Lindburg explaining the origin of the sinkholes in the Sedona area. They are from collapse of the overlying sandstone into a cave system in the Redwall limestone 500 or more feed below. The Redwall is the aquifer carrying water from the Rim to the Verde River under the town of Sedona.

This is Paul explaining the outcrop evidence for the timing of the faulting that formed the Verde Valley.

Paul again put on a tremendous field trip. It was attended by 35 people of all levels of geologic expertise and they all learned new things. His ability the communicate the "Geologic Story" to everyone makes for a great trip.

Harry Allen

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