PAPERS PRESENTED 93 



observations for quantitative estimates of material transported and rates of 

 deposition. Some comparisons with work done by rivers. 



Presented with occasional reference to manuscript. Discussion by 



Taff. 



COAL RESOURCES OF CHINA 

 BY N. F. DRAKE 



(Abstract) 



Varieties of the coal and their geologic and geographic distributions. Out- 

 lines of the more important coal fields, with some estimates of the thickness 

 of included coal beds. 



Presented with manuscript, outline, and map. Discussion by Lawson 

 and Louderback. 



GEOLOGICAL SECTION OF A PORTION OF THE COAST RANGES IN THE 

 EASTERN PART OF SAN LUIS OBISPO COUNTY, CALIFORNIA 



BY BRUCE MARTIN 



(Abstract) 



A discussion of the early and late Neocene deposits of that region, Including 

 horizons corresponding to Temblor, Monterey shale, Santa Margarita, and 

 Tulare or Paso Robles formations. The sequence of marine beds are appar- 

 ently conformable from the base of the Temblor to the upper part of the Santa 

 Margarita. The brackish and fresh water Tulare (?) or Paso Robles (?) for- 

 mation overlies unconformably the Santa Margarita. Remnants provisionally 

 grouped with Paso Robles (?) rest horizontally on tilted Monterey and lower 

 Santa Margarita. 



Presented in abstract from notes. Discussion by Gester and Louder- 

 back. 



VALIDITY OF THE LAW OF RATIONAL INDICES OF CRYSTAL /•' WB8 

 BY AUSTIN F. ROGERS 



(Abstract) 



Are the indices of crystal faces whole numbers or simple whole numbers, ox- 

 Is there any meaning to the law of rational Indices? On the assumption that 

 only two, three, four, and six fold axes of symmetry are possible, it may be 

 proved that the indices of crystal faces are whole numbers, bu1 not necessarily 

 simple whole numbers. There is a remarkable analogy between the funda- 

 mental laws of crystallography and chemistry. 



Presented in abstract from notes; illustrated by diagrams, Discussion 



by Louderback and Eakle. 



