UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGICAL SCIENCES 



Vol. 13, No. 9, pp. 319-41 1, pis. 17-23, 1 map, 12 text-figs. December 30, 1922 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGICAL SCIENCES 



GEOLOGY OF SAN BERNARDINO MOUNTAINS 

 NORTH OF SAN GORGONIO PASS 



BY 



FRANCIS EDWARD VAUGHAN 



CONTENTS 



PAGE 



Introduction 320 



Topography , 321 



General statement 321 



First cycle 323 



Second and third cycles 325 



Fourth cycle 333 



Glacial features 335 



The desert 337 



Alluvial fans in San Gorgonio Pass 340 



Summary 342 



Geology 344 



General statement , 344 



Undifferentiated schists 345 



Summary 352 



The older sediments 352 



Arrastre quartzite 352 



Furnace limestone 355 



Saragossa quartzite 357 



Age of the older sediments 361 



Conclusion 363 



Granites 363 



The Tertiary formations 374 



Potato sandstone 374 



Lion sandstone 375 



Hathaway formation 376 



Santa Ana sandstone 378 



Pipes fanglomerate 379 



Basalt 380 



Quarternary fanglomerates 384 



Deep Canon fanglomerate 384 



The older desert deposits 385 



Coachella fanglomerate 386 



Cabezon fanglomerate 387 



Heights fanglomerate 392 



