TITLES AND ABSTKACTS OF PAPERS 125 



It is recommended that mineral analyses be recorded in the form of metal 

 and acid radicals instead of in the form of oxides, and that the molecular 

 ratios be given with the analyses. 



Presented from notes. Discussion by Eakle, Londerback, and Weber. 



80ME CONTACT METAMORPHIC MINERALS IN CRYSTALLINE LIMESTONE AT 

 CRESTMORE, NEAR RIVERSIDE, CALIFORNIA 



BY ARTHUR S. EAKLE 



{Abstract) 



An interesting deposit of white and sky blue, coarsely crystalline limestone 

 occurs at Crestmore on a contact with granodiorite, and various minerals have 

 been formed, some of them very unusual. The paper described xanthophyllite, 

 monticellite, brucite, vesuvianite, garnet, wollastonite, and other silicates and 

 contains the chemical analyses of some of them. 



Illustrated by specimens. 



The meeting adjourned at 12.10 for lunch. 



The afternoon session was called to order at 2.25, with Professor Eakle 

 in the chair. 



ELECTION" OF OFFICEES 



The following officers were elected for the ensuing year : 



Chairman, J. C. Bkanner. 

 Secretary, G. D. Loudeeback. 

 Councillor, W. S. Tangier Smith. 



On motion of the secretary, it was voted to extend a cordial invitation 

 to the general Society to meet in San Francisco in 1915. 



It was also voted that the secretary of the section when sending pre- 

 liminary notices of the annual meeting should inclose a list of members 

 of the Cordilleran Section, which may be used as a ballot for the nomina- 

 tion of officers. 



The following papers were then presented and discussed: 



RESISTANT SURFACES DEVELOPED BY EROSION AND DEPOSITION IN THE 

 ARID AND SEMI-ARID REGIONS OF ARIZONA 



BY C. F. TOLMAN, JR. 



Presented from notes. Questions were asked by J. C. Jones, Hoi way, 

 and Moody, bringing out further evidence for the conclusions presented. 

 Discussion by Jones and Louderback. 



