AGE — ALGONKIAN 3 



Page 

 Age, Definition of topographic 2, 547 



— of the auriferous slates of the Sierra Nevada ; J. P. Smith 5, 243 



earth, Estimates of. 4, 204 



lower coals of Henry county, Missouri ; David White 8, 287 



white limestone of Sussex county, New Jersey ; J. E. Wolff and 



A. H. Brooks 8, 397 



Aguilera, J. G., Election of. 8, 1, 360 



— , Reference to geology of Mexico by . , 9, 20, 28 



Akkrly, Samuel, cited on Coastal Plain deposits 8, 318 



Alabama, Analyses of slates and shales from 9, 308 



soils and clays from 9, 309 



— , Ancient topography of . . 2, 561 



— , Appomattox formation in 2, 2 



J—, Asphalt in 3, 188 



— , Conglomerates of 5, 189 



— , Cretaceous and Tertiary strata of 2, 587 



— , Devonian rocks of. 5, 470 



— , Figure of Snbcarboniferous fossil from 7, 254 



— , Geologic section in 6, 106 



— , Geology of a portion of Coosa valley in 5, 465 



— , Middleton formation of 3, 51 1 



— , Silurian rocks of 5, 469 



— , Zapata formation the equivalent of Columbia of. 6, 129 



— Ri VEiJ, Section on 2. 606 



Alaska, Geological sketch of cape Vancouver 5, 134 



— , Geology of. 3, 495, 496 



Middleton island in 4, 427 



— , Glaciation of. 2, 266 ; 7, 29, 30 



— , Glaciers of. 3, 139 ; 7, 19 



— , Malaspina glacier in 5, 81 



— , Shore forms on coast of. 7, 415 



— , Surface geology of. 1, 99 



Alaskan coast as an evidence of subsidence 6, 160 



Alberta, Glacial deposits of 7,31 



river courses in 2, 245 



Albirupean, Proposed abandonment of term 2, 436 



Aldrich, T. H., cited on Ahim bluff fossils 5, 148 



AnctrpKYONiA, New species of. 3, 404 



Aleutian lsland.s, Geological sketch of the 5, 119 



Algonkian age of Pikes Peak granite 6, 471 



— , Definition of the term 1, 238 



— period. Definition of 10, 201 



, Lake Superior region in the 10, 221 



— rocks, Disintegration of 2, 221 



, Fossils from 10, 227 



, Grand Canyon series of 10, 215 



of Minnesota.. 3, 335 



Texas 6, 376 



