WEEKS.] 
PETROLOGY, AND MINERALOGY FOR 1892-1900. 
23 
Archean and Algonkian — Continued. 
Great Lakes region— Continued. 
Iron ores of Lake Superior region, Van Hise, 
5679. 
Kawishiwin agglomerate of Ely, Winchell, 
N. H., 6293. 
Keweenawan according to Wisconsin geolo- 
gists, Winchell, N. H., 6312. 
Lake Superior copper deposits, Wadsworth, 
5770. 
Lake Superior region, sketch of, Van Hise, 
5684. 
Latest eruptive of the Lake Superior region, 
Winchell, N. H., 6315. 
Magnetic observations, Smyth, 5104. 
Marquette district, Van Hise and Bayley, 
5704. 
Marquette iron district, Van Hise, 5692. 
Marquette iron district, Michigan, Van Bise 
and Bayley, 5696. 
Menominee special folio, Van Hise and Bay- 
Icy, 5713. 
Mesabi iron range, Winchell, H. V., 6278. 
Name of copper-bearing rocks, Grant, 2113. 
Ogishke conglomerate, Grant, 2103. 
Paleontologic base of the Cambrian, Win- 
chell, X. II.. 6308. 
Quartz keratophyre from the Baraboo Bluffs, 
Wis., Wcidman, 5969. 
Rainy Lake gold region, Minnesota,Winchell 
and Grant, 6289. 
Rational view of the Keweenawan, Winchell, 
N. II., 6313. 
Relations of the Menominee and Marquette 
scries, Smyth, II. L., 5098. 
Reporl on field work in 1893, Spurr, 5167. 
Report on field work in Minnesota in 1893, 
Upham, 5571. 
Report on Isle Royale, Michigan, Lane, 3393. 
Report on Rainy Lake gold region, Winchell, 
H. V., and Grant, 6285. 
Republic trough, Smyth, 5100,5102. 
Sioux quartzite, Beyer, 433. 
State of Minnesota, Grant, 2107. 
Stratigraphic position of the Thompson slates, 
Spurr, 5170. 
Structural geology, Minnesota, Winchell, 6372. 
Study of contact metamorphism, Michigan, 
Clements, 1016. 
Sturgeon River tongue, Michigan, Bayley, 
319. 
Synchronism of the Lake Superior region with 
other portions of North America, Winchell, 
N. H., 6314. 
Taxonomy of the rocks of Lake Supeiior re- 
gion, Winchell, N. H., 6316. 
Upper Peninsula of Michigan, Rominger, 4664. 
Volcanic rocks in the Keewatin, Grant, 2111. 
Volcanics of the Michigamme district, Mich- 
igan, Clements, 1013. 
Waterloo quartzite, Buell, 659. 
Mississippi Valley region. 
Age of the Sioux quartzite, Keyes, 2078. 
Bauxite, Hayes, 2415. 
Characteristics of the Ozark Mountains, 
Keyes, 3087. 
Disseminated lead ores of Missouri, Winslow, 
6395. 
Geological occurrence of clays, Keyes, 3090. 
Geologic history of Missouri, Winslow, 6393. 
Archean and Algonkian— Continued. 
Mississippi I 'alley region— Continued. 
Geology of Lyon and Sioux counties, Iowa, 
Wilder, 6140, 
Geology and water resources of a portion of 
southeastern South Dakota, Todd, 5436. 
Iron Mountain sheet, Winslow, Ha worth, and 
Nason, 6397. 
Lead and zinc deposits, Missouri, Winslow, 
6392. 
Paleontology of Missouri, Part I, Keyes, 3061. 
Paleozoic strata of Iowa, Norton, 4117. 
Report on Mine la Motte sheet, Keyes, 3088. 
Ozark region. 
Correlation in Ozark region, Hershey, 2490. 
Geology of the Wichita Mountains, Bain, 
212. 
Geology of Missouri, Gallaher, 1933a. 
Igneous complex of Magnet Cave, Arkansas, 
Washington, 5878. 
Rocky Moii ntai it region. 
Absaroka folio, Wyoming, Hague, 2236. 
Archean-Cambrian contact in Colorado, 
Crosby, 1168. 
Castle Mountain district, Weed and Pirsson, 
5935. 
Fort Henton folio, Montana, Weed, 5915. 
Geological reconnoissancein northwest Wyo- 
ming, Eldridge, 1024. 
Geology of Dakota tin mines, Ulke, 5528. 
Geology Of Helena, (iris wold, 2202. 
Ge< 'logy of Little Belt Mountains, Weed, 5953. 
Geology of Mexico. Bain, 189. 
Geology of Palmer Lake. Cannon, 717. 
Geology of South Dakota, Todd, 5407. 
Geology of the northern Black Hills, Irving, 
2868. 
Geology of the Rico Mountains, Colorado, 
Cross and Spencer, 1206. 
Utile Belt Mountains folio, Montana, Weed, 
5946. 
Livingston folio, Iddings and Weed, 2831. 
Paleozoic section of Three Forks, Peale, 4264. 
Potsdam gold ores, Smith, 5021. 
Pueblo folio, Gilbert, 2005. 
Section along Rapid Creek, Todd, 5424. 
Sedimentary rocks, Weed, 5930. 
Series of peculiar schists, Cross, 1184. 
Tulluride folio, Colorado, Cross, 1201. 
Tenmile folio, Emmons, 1712. 
Three Forks folio, Peale, 4267. 
Walsenburg folio, Hills, 2599. 
Great Basin region. 
Algonkian rocks of the Grand Canyon of the 
Colorado, Walcott, 5799. 
Pre Cambrian igneous rocks of the Grand 
Canyon, Walcott, 5792. 
Section in Congress Canyon, Freeh, 1891. 
Arizona. 
Albuquerque to Flagstaff and the Grand 
Canyon, Gilbert, 1991. 
Algonkian rocks of the Grand Canyon of the 
Colorado, Walcott, 5799. 
Anthracite coal in Arizona, Blake, 474. 
Arizona copper deposit, Blandy, 486. 
Arizona, geology of, Blandy, 485. 
A rock fissure, Gilbert, 1997. 
Calcite group from Bisbee, Hovey, 2773. 
Chloride district, Comstock, 1063. 
