Abstract

 Page 
Abruzzi and Bryant, cited on condition of marine glacier 273 
Accessions to Library, List of 671–680 
Adams, F. D., Analysis of granite-gneiss by 486, 487 
Adirondack syenite, Asymmetric differentiation in a bathylith of 477–492 
— —, Character of 478–480 
— —, Comparison of anorthosite with 480 
— —, Location of bathylith of 478 
Africa, Former connection with Madagascar of 236 
Afton craters of southern New Mexico 211–220 
— — — — —, Causes of formation of 218–220 
— — — — —, Depressions analogous to 217 
— — — — —, Fossils of 213–215 
— — — — —, General description of 211, 212 
— — — — —, Geographic features of 212, 213 
— — — — —, Geologic conditions obtaining in 213–215 
— — — — —, Hydrologic conditions of 217 
— — — — —, Pre-Quaternary formations of the 215, 216 
— — — — —, Volcanic action of 216 
Aftonian interglacial stage, Erosion dating from 513 
Agassiz glacier, Malaspina glacier contributed to by 260 
Air and water currents, Action of, in concentration 
Alabama, Mississippi formation in 142 
—, Occurrence of Rockcastle sandstone in  
 Page 
Abruzzi and Bryant, cited on condition of marine glacier 273 
Accessions to Library, List of 671–680 
Adams, F. D., Analysis of granite-gneiss by 486, 487 
Adirondack syenite, Asymmetric differentiation in a bathylith of 477–492 
— —, Character of 478–480 
— —, Comparison of anorthosite with 480 
— —, Location of bathylith of 478 
Africa, Former connection with Madagascar of 236 
Afton craters of southern New Mexico 211–220 
— — — — —, Causes of formation of 218–220 
— — — — —, Depressions analogous to 217 
— — — — —, Fossils of 213–215 
— — — — —, General description of 211, 212 
— — — — —, Geographic features of 212, 213 
— — — — —, Geologic conditions obtaining in 213–215 
— — — — —, Hydrologic conditions of 217 
— — — — —, Pre-Quaternary formations of the 215, 216 
— — — — —, Volcanic action of 216 
Aftonian interglacial stage, Erosion dating from 513 
Agassiz glacier, Malaspina glacier contributed to by 260 
Air and water currents, Action of, in concentration 
Alabama, Mississippi formation in 142 
—, Occurrence of Rockcastle sandstone in  

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