C N T li N T S 



Letter of transmittal 



Preface 



Odtline of this volume 



Chapter I. — General description 



Chapter II.— Geological sketcli of the Eureka District 



Chapter III. — Cambrian aiitl Silurian rocks 



Chapter IV. — Devouiau and Carboniferous rocks 



Chapter v.— Descriptive geology 



Chapter VI.— General discussion of the Paleozoic rocks 



Chapter VII.— Pre-Tertiary igneous rocks 



Chapter VIII.— Tertiary and post-Tertiary volcanic rocks 



Chapter IX. — Ore deposits 



Appendix A.— Systematic lists of fossils of each geological horizon. By C. D. Walcott- ... 317 



Appendix B.— Microscopical petrography of the eruptive rocks. By J. P. Iddings 



Index 



1 



8 

 M 

 63 

 99 

 175 

 218 

 230 

 292 



335 



407 



