Abstract

 Page 
Actinopteria, Occurrence of 283 
Actinium, Probable origin of 117 
Adams, F. D., Studies of Laurentian and Hastings districts of the pre-Cambrian by 2–4 
—, Title of paper by 
Address of President (C. R. Van Hise) l–28 
Afghanistan, Similarity of Talchir conglomerates to those of 350 
Africa, Extent of glaciation in 348–349 
“Agnotozoic,” Use of term 13 
Alaska, Geologic reconnaissance of Porcupine valley 315–338 
—, Northern, Extent of Carboniferous in 335–336 
—, Paleozoic rocks of Upper Yukon region of 255–314 
Albuquerque meeting, Register of 578 
—, New Mexico, Annual meeting held at 513 
— —, Proceedings of annual meeting held at 513–600 
— —, Tertiary deposits at 67 
Algonkian series, Composition of 18 
— formation, Correlation of 15 
— and Archean formations, Differences between 19 
— formation, Grouping of Keweenawan and Huronian in 12 
— and Archean formations, Unconformity of 17 
—, Use of term 16 
Alling, A. N., cited on forms of topaz crystals 185 
 Page 
Actinopteria, Occurrence of 283 
Actinium, Probable origin of 117 
Adams, F. D., Studies of Laurentian and Hastings districts of the pre-Cambrian by 2–4 
—, Title of paper by 
Address of President (C. R. Van Hise) l–28 
Afghanistan, Similarity of Talchir conglomerates to those of 350 
Africa, Extent of glaciation in 348–349 
“Agnotozoic,” Use of term 13 
Alaska, Geologic reconnaissance of Porcupine valley 315–338 
—, Northern, Extent of Carboniferous in 335–336 
—, Paleozoic rocks of Upper Yukon region of 255–314 
Albuquerque meeting, Register of 578 
—, New Mexico, Annual meeting held at 513 
— —, Proceedings of annual meeting held at 513–600 
— —, Tertiary deposits at 67 
Algonkian series, Composition of 18 
— formation, Correlation of 15 
— and Archean formations, Differences between 19 
— formation, Grouping of Keweenawan and Huronian in 12 
— and Archean formations, Unconformity of 17 
—, Use of term 16 
Alling, A. N., cited on forms of topaz crystals 185 

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