CONTENTS. XI 



Page. 

 Chapter V. — Chemical iiistouy of Lake Lahontan — Continued. 



Section U. Chemical (Irjiosits of Luke Laliontiiu — Contimied. 



Chemical composiliou of the tula deposits 503 



Succession of tula deposits 204 



Tufa dejiosits in the form of towers, domes, castles, crags, etc '207 



Couditious'favoMug the deposition of tufa 210 



Section 3. Desiccation products 223 



The fri'shcning of lakes by desiecaliou 224 



Section 4. Efflorescences . 230 



Buttalo Springs salt works 232 



Eagle salt works 233 



Sand Spring salt works 234 



Resume of chemical history 230 



Chapter VI. — Life histoi!y f)F Lake Lahdntan 238 



Summa I > 249 



Chapter VII. — Resume of history of Lake Lahontan 2.''>0 



Chapter VIII. — Quaternary climate 2.^4 



Chapter IX.— Geological age or Lake Lahontan 269 



Chapter X. — Post-Lahontan orographic movement 274 



Index 285 



TABLES OF CHEMICAL ANALYSES. 



Table A. — Analyses of Aii'eri^aii river waters 174 



B. — Analyses of Aineric.m spring waters 17t) 



C— Analyses of the waters of inclosed lakes ItO 



D. — Composition of the principal lakes and rivers of the Lahontan basin 225 



