We will open for the summer on Memorial Weekend.
We will keep you posted as to what our hours for the summer will be.

We will open by appointment. (Unable to open for appointments right now as there is way to much snow yet!)

  You can still purchase off our web page.   
  We do mail orders. 

 If purchasing more than one item, we do combine shipping costs.   
 

Featuring lapidary supplies, Michigan minerals, Petoskey stones, Lake Superior agates, and rock-related books. Michigan and other state postcards. Nice selection of antiques and collectibles.
Home
About Us
Payment Policies
Shipping Policies
Returns and Refunds
Feedback
Menu

A Geologic and Inclusion Study of the Lake Superior Agates Book Kasper

Study of Lake Superior Agates

A Geologic and Inclusion Study of the Lake Superior Agates Book Kasper

$75.00

Published 2011, Revised 2012, 208pp, 8.5 x 11 spiral bound, full color laser printed.

By Donald Kasper

Have a question?

  Unavailable


A major work by the author describing this regions" identified agate inclusions and their proposed geochemistry of formation.
Also includes additional study of the clays in the agates.

Key Features:

This book proposes and presents the data to support the model view that the Lake Superior agates formed in metamorphosed basalts in lava flow tops that were highly vesicular, around Cretaceous. At that time, substantial ash deposits of the Midwest from Western volcanism released silica that filled these voids (amygdules). Earlier clay deposits of illite dominant in the midwestern rock strata from Ordovician was also released by this local tectonic activity, introduced as inclusions of various types in the amygdules and in some vein agates. The geochemistry behind these and other inclusion reactions, and their correlation to regional geologic systems is described.

Condition - Excellent. NEW...

Shipped via Parcel Post.

Study of Lake Superior Agates
Geologic Inclusion Study Agate
Study of Lake Superior Agates