68 The American Geologist. February, 1903. 
Salt River !»1 
, Lower Jem'-z River 94 
Mountains 95 
San Dia Mountains 95 
Jemez Mountains 95 
Villages and Cities 95 
General Survey 9t> 
Sand Dunes 97 
Mt. Cabizon 97 
Mt. Pelade 98 
Medicinal Springs 9S 
Phillip's Springs 9?^ 
San Isidro Springs 99 
Indian Springs 99 
Jemez Kot Springs lUil 
The Soda Dam 101 
The Sulphurs lOli 
General Survey of Springs liJ- 
The Tufa Flows 103 
Age of the Tufa of the Jemez mountain District 103 
The Basaltic Volcanoes and the Lavas outpoured by Them 104 
The Rio Puerco Series . . 104 
The Rio Grande Series 104 
The Albuquerque Valcanoes 105 
The Bcrnallilo Volcanoes 105 
The San Felipe Volcanoes lOo 
Date of Eruption of the Rio Grande Series 106 
Ecorwomics. 
Climate.... lOS 
Soil lOS 
Irrigation 109 
Mining 110 
Mineral Resources 110 
Coal 110 
Gypsum 110 
Gold. Silver and Copper 110 
Placer 110 
The following pages are derived from studies carried on at 
intervals during the writer's stay at Jemez Pueblo as govern- 
ment farmer. While there he took work by correspondence 
in the University of New Mexico ; and the original reports, on 
which this paper is based, were submitted, for the most part, 
to Dr. C. L. Herrick, then president of that university. 
In submitting this paper the writer gratefully acknowledg- 
es the assistance of professor G. B. Haggett, who accompan- 
ied him on several of the expeditions upon which this paper 
rests and whose photographs are here used by his permission. 
He wishes also to acknowledge his special indebtedness to 
both Dr. C. L. Herrick for the valuable aid rendered him when 
studying the region, and also to Drs. J. W. Beede and F. A". 
Marsters for their personal aid while the paper was being 
written. 
