Author: Minshall, Herbert L. Buchanan Canyon: ancient human presence in the Americas. Slawson Communications, 1989.
“A glorious success…The science manages to be as exciting and spellbinding as the juiciest gossip” (San
This book always was and has become a masterpiece of Agates and Jaspers. Author: Gibbs, Ron
Author: Shaub, Benjamin Martin The origin of agates, thundereggs, Bruneau jasper, septaria and butterfly agates. Agate