UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 6, No. 2, pp. 21-53, Pis. 1-12 Issued November 30, 1910 



TERTIARY MAMMAL BEDS 



OF 



VIRGIN VALLEY AND THOUSAND CREEK 



IN 



NORTHWESTERN NEVADA 



BY 



JOHN C. MERRIAM 



PART I.-GEOLQGIC HISTORY 



BERKELEY 

 THE UNIVERSITY PRESS 



