CONTENTS-PART II. 



CHAPTER I. 



GENERAL OEOLOGICAL FEATUKE3 OF TUE COUNTEV. 



Page. 



General, physical, and geological features of the country -- 1 



Springs and streams 2 



Change in the scenery - i 



Eagle Springs - — 5 



Table lauds along the R'O Bravo. - - 6 



Valley of El Paso - - 7 



Mountains near El Paso 9 



Sand hills on the Chihuahua road - 11 



San Pedro mines - - -- -- - 12 



Corrallitos an:l Baranca 13 



Sierra Madre, or Water-shed - 15 



From San Bernardino to Santa Cruz w. 17 



From Santa Cruz to Tucson - - - 19 



Mineral products . - 21 



Note by Major Emory - 23 



Analysis of minerals 24 



CHAPTER II. 



SUBSTANCE OF THE SKETCH OF THE GEOLOGY OF THE LOWER EIO BRAVO DEL NOKTE. 



From the Pecos dowTiward, valleys, stratification, water holes . - 29 



Bottom land, antediluvial dunes, upper metamorphic limestone 30 



How watered ; interspersed strata - -- 31 



The Dyke - 32 



Parallelism and volcanic cross axis -- -- 33 



Basaltic hills ; volcanic dykes in Texas. 33 



Dr. Roemer's views - - 33 



Meteoric iron ; green sand with lignite - — - 34 



Lignite coal -. 35 



Bitumen ; blue volitic limestone — — 36 



Blue clay ; green sand with fossil oysters and shells - - -- 37 



Septaria3 -- - -- - 3T 



Fossil bone - 39 



Fossil wood - -- 39 



Physical features of the country - - -- - ^9 



Tributaries - - ■11 



The islands 41 



The Flora , 43 



Thecolluvial belt 43 



The coast - -- ** 



All uvial development . - 45 



General view of organic remainw 47 



