434 
INDEX 
Sierra de los Caballos, girdling, dia¬ 
gram, 169 
Significance of Girdled Mountain, 
168 
Siluric rocks, Arizona, 240; Bolivia, 
195; discovery in New Mexico, 
142; South America, 192 
Silver shales, 338 
Simon sandstones, 318 
Sinian system, 369 
Sketch-map of Pennsylvania anor¬ 
thosites, 36 
Smith, I. F., Anorthosites of Penn¬ 
sylvania, 29 
Smith, J. E., Geology in Rural Wel¬ 
fare, 283 
Smith, William, mention, 1 
Soils of arid lands, 227; buried, 349; 
erosion losses, 286; Palouse soil 
of Washington, 360 
Sonora, basin ranges, 64 
South America, outlines of geology, 
187; land connections, 215 
South Carolina, Cretacic section, 28 
Southernmost Extension of Kansas 
Tills, 378 
Sparta dolomite, synonym, 320 
Spieker, E. M., cited, 211 
Spokane, Glacial border, 359; pla¬ 
teau, 359 
Springer, F., Balanocrinus in Amer¬ 
ica, 263; response at bronze pre¬ 
sentation, 185 
Springer, F., cited, 263 
Springer, Frank, bronze bust, 177; 
poem by Lummis, 177 
Spurr, J. E., cited, 62; quoted, 256 
St. Lawrence limestone, 324; syno¬ 
nym, 321 
Stratigraphical geology, 335; Ab¬ 
sence of Laramian Beds in South¬ 
ern Rockies, 150; Pennsylvanian 
in Time Span, 153; Permian Ro«cks 
of Grand Canyon, 147; Superior 
Paleozoics of Rio Grande, 154; 
Use of Chester as Terranal Title, 
149 
Stanton, T. W., Biotic Taxonomy of 
Comanche Succession, 266 
Stanton, T. W., cited, 208, 267 
Stephenson, L. W., cited, 20, 263, 
266 
Structure of Basin ranges, 253 
Subcarbgniferous rocks, 344 
Suess, E., cited, 52, 53; quoted, 368 
Summital plain of Rocky Mountains, 
129 
Supaian series of Arizona, 411 
Superior Glacial lobe in Minnesota, 
399 
Superior Paleozoics of Rio Grande, 
154 
Surveys, Pacific Railroad, 328 
Swallow, G. C., cited, 149, 341 
Sweetgrass oil field, 93 
Tanner shales, 338 
Tapeats sandstone of Arizona, 303 
Tarrasenko, M., cited, 31 
Taxonomy of Comanche succession, 
266 
Teall, J. J. H., cited. 31 
Tectonic setting of Muddy range, 
257 
Tennessean series, 348 
Terebratula from Maryland, 19; 
Marylandica, 21 
Terranal differentiation of Iowa 
Cambric, 313 
Terranes, hemeral divisions, 84 
Terreplein of High plateaux, 122, 
132; Mesa de Maya, 130 
Tertic basalts, 112 
Tertic rocks of Arizona, 248; New 
Mexico, 151; Rocky Mountains, 
126; South America, 216 
Tetrehedral globe, 56 
Texas, Corazon peneplain, 124 
Thrust faulting, 73 
Thwaites, F. T., cited, 318 
Tilton, J. L., cited, 406 
Time span of Pennsylvanian, 153 
Ting, V. K., address of welcome, 
107 
Tipton sandstones, 317 
Todd, J. E., cited, 378 
Triassic rocks, Arizona, 246; Ba¬ 
varia, 115; Brazil, 200; Pennsyl¬ 
vania, 39; South America, 208 
Trinity sandstones, 338 
Tolchico shales, 338 
Torrellian hypothesis, 357 
Torreon clays, 338 
Troost, G., cited, 315 
Truxton limestones, 338 
Tschernyschew, T., quoted, 148 
Tubarao series of Brazil, 200 
Tucumcari peneplain, 124 
Twenhofel, W. H., cited, 318, 325 
Twitchell, R. E., tribute to F. 
Springer, 181 
Udden, J. A., cited, 406 
Ulrich, E. O., cited, 149, 318, 346 
