iii International Committee on Natural Zeolites

vi Highway map showing route and stops on Zeo-Trip '93

vii Preface

1. Geology and Diagenetic Mineralogy of the Castle Creek Zeolite Deposit
   and the Ben-Jel Bentonite Deposit, Chalk Hills Formation, Oreana, Idaho
   R. A. Sheppard

14. Mineralogy, Chemistry, and Genesis of Tuffs of the Sucker Creek Formation (Miocene),
    Eastern Oregon
    Stephen P. Altaner and Glen A. Teague

30 Geology and Mineralogy of the Durkee Zeolite Deposit, Durkee, Oregon
A. J. Gude, 3rd and Richard A. Sheppard

42 Geology and Mineralogy of the Harney Lake Zeolite Deposit, Harney County, Oregon
R. A. Sheppard

59 Geology and Mineralogy of the Rome Zeolite Deposit, Rome, Oregon
R. A. Sheppard and Arthur J. Gude, 3rd

73 Geology of the Sheaville Clinoptilolite Deposit, Sheaville, Oregon
R. A. Sheppard and Arthur J. Gude, 3rd

80 Discovery and Commercial Interest in Zeolite Deposits Examined during Zeo-Trip '93
F. A. Mumpton