A Student's Guide to the Genesis of the Lithophysae--Geodes and Amygdules

By: Donald Kasper

Simple intro as to how geodes/thundereggs really form in volcanic systems.

• Format: Plastic Comb
• Language: English
• ISBN: 0986367443
• ISBN13: 9780986367441
• Release Date: February 2012
• Publisher: Kasper Jasper Press
• Length: 40 Pages