CONTENTS AND 1 IJ.USTIIATIONS V 



PllgO 



Neocene basins of the KUunath mountains [abstract] ; by F. W. 



Andkrson 500 



Age of certain granites in the Khiniath mountains [abstract] ; by O. II. 



Hershey 501 



Feldspar-corunilum rock from Phimas county, CaMfornia faljstract] ; 



by A. C. Lawson 501 



Register of San Francisco meeting of the Cordilleran Section, 1900 502 



Accessions to l.il)rary from June, 11)00, to June, 1901 503 



Otticers and Fellows of the Geological Society of America 513 



Index to volume 12 523 



ILLUSTRATIONS 



Plates 



Plate 1 — Upham : Map of Saint Croix Interstate park 25 



" 2 — Hitchcock : Terminal cones of the Mauna Loa flow of 1899 46 



" 3 " Eru{)tion of 1899 47 



" 4 *' Terminal cone in action, July 19 48 



*' 5 " Summit of crater of Mokuaweoweo 50 



" 6— Watson : Map of localities described 93 



" 7 " Granite quarry and eroded surfiice in residual clays (2 



figures) 95 



" 8 " Porphyritic granite near Palmetto, Georgia (2 figures) 96 



'* 9 " Residual clays derived from a foliated biotite porphyritic 



granite (2 figures) . ^ 97 



" 10 " Granite-gneiss, Litbouia, Georgia (2 figures) 98 



*' 11 " Residual clays derived fromdecay of gneiss, near Atlanta, 



Georgia (2 figures) 99 



" 12— WiNCHELL : Glacial lakes of Minnesota 109 



" 13— Barbour: View of Devil hill, South Dakota 165 



"14 " Sand rock and portion of great pipe, Devil hill, South 



Dakota (2 figures) 166 



" 15 '* Twins, interpenetrations, clusters, and stages in concre- 

 tion building (2 figures) 167 



"16 " Sand concretions, sheaf cr3^stals, and interpenetration — 



twins (2 figures) 168 



"17 " Cluster of sand crystals 169 



" 18 " Lamination, gross-minute structure (2 figures) 170 



" 19 — Kkyes: Correlated general sections of the Carboniferous in western 



interior basin 177 



" 20 — Spurr: Great Basin ranges of southern Nevada and adjacent Cali- 

 fornia 266 



" 21 " Typical front of Great Basin range 266 



" 22 " Diagram of observed fold axes in Nevada and adjacent 



California 267 



•' 23 " Efiects of faulting on topography (5 figures) 268 



