INDEX TO VOLUME XXVIII 



757 



Geologic Map of Brazil. By J. C. Branner. Review by Bailey Willis 

 Geologic Reconnaissance of the Southern Part of the Taos Range, New 



Mexico. By John W. Gruner 



Glass-Sponge Colonies of the Devonian, The Great; Their Origin, Rise, 



and Disappearance. By John M. Clarke . . . . 

 Grout, Frank F. Movements in Crystallizing Magma . 

 Gruner, John W. Geologic Reconnaissance of the Southern Part of the 



Taos Range, New Mexico 



Gumbotil, The Origin of. By George F. Kay and J. Newton Pearce 



Heart Mountain Overthrust, Wyoming, The. By D. F. Hewett . 

 Hewett, D. F. The Heart Mountain Overthrust, Wyoming . 

 Hills, T. M. Some Estimates of the Thickness of the Sedimentary 

 Rocks of Ohio 



Ice, On Some Physical Properties of. By Motonori Matsuyama 

 Igneous Rocks, A Quantitative Mineralogical Classification of — 



Revised. By Albert Johannsen 38, i5< 



Illinois Geological Survey. Bulletin 49: Oil Investigations in 191 7 and 



1918 



James, Albert V. G. Factors Producing Columnar Structure in Lavas 

 and Its Occurrence near Melbourne, Australia 



Johannsen, Albert. A Quantitative Mineralogical Classification of 

 Igneous Rocks — Revised 38, 15^ 



Joints, The Mechanical Interpretation of. I. By Walter H. Bucher . 



Juan de Fuca Lobe of Cordilleran Ice Sheet, The. By J Harlen Bretz 



Kaolin of Indiana. By W. N. Logan. Review by S. S. V. 



Katmai Region, Alaska, and the Great Eruption of 191 2, The. By 



Clarence N. Fanner 



Kay, George F., and J. Newton Pearce. The Origin of Gumbotil 



Keyes, Charles. Geological Setting of New Mexico 



— ■ . Paleozoic Diastrophics of the Northern Mexican Tableland 



Logan, W. N. Kaolin of Indiana. Review by S. S. V. . . 



Matsuyama, Motonori. On Some Physical Properties of Ice 

 McCoy, A. W. "Notes on Principles of Oil Accumulation," A Discus 



sion of. By Chester W. Washburne 



. Reply to Discussion by C. W. Washburne on "Notes on 



Principles of Oil Accumulation" 



Mead, Warren J. Notes on the Mechanics of Geologic Structures 

 Mechanical Interpretation of Joints, The. By Walter H. Bucher. I 

 Mechanics of Geologic Structures, Notes on the. By Warren J. Mead 

 Metamorphic Rocks, A Test of the Feldspar Method for the Determina- 

 tion of the Origin of. By Charles Gordon Carlson .... 



PAGE 

 268 



730 



25 



255 



730 



536 



536 



84 



607 



659 



45J 



707 



470 



569 

 89 



233 

 75 



470 

 607 



366 



371 

 505 

 707 



505 

 632 



