dahton.] 



NORTti AMERICAN GfiOLOGY. 



647 



Minnesota — Continued. 



1888. Report — division of glacial geol- 

 ogy, United States Geological 



Survey, Chamberlin, T. C. 

 Spotted rooks from Pigeon Point, 



Bayley. 

 Taconio system, Miller. 

 Unconformities of the Animikie, 



Wincliell, A. 

 Well at Keokuk and [Albert 



Lea], Gordon. 

 Report of survey during 1887, 



Winchell, A. 

 Later Cretaceous in Iowa, Am. 



Geol. 

 Animikie slates and quartzites, 



Wiucbell, N. H. 

 Classification of Cambrian and 



pre-Cambrian, Irving, R. D. 

 Correlation of Animikie aud Hu- 



ronian, McKellar. 

 Cretaceous outliers, Winchell, 



N. H. 

 Eccentricity theory of glacial 



cold [Falls of St. Anthony], 



Claypole. 

 Geology of central counties, Up- 



bam. 

 Preface, geology of Minnesota, 



Winchell, N. H. 

 Geology of Wabasha, Goodhue, 



Dakota, Hennepiu, Ramsey, 



aud Washington counties, 



Wiuohell, N. H. 

 Great Primordial quartzite, Win- 

 chell, N. H. 

 Conditions of artesian wells. 



Hall, C. W. 

 Changes in ice currents in glacial 



epoch, Upham. 

 Copper mining. Hall, C. W. 

 The crystalline rocks, Winchell, 



N.H. 

 Description of some maps, Up- 

 ham. 

 Diabasio schists with jaspilyte, 



Winchell, H. V. 

 Thoughts on eruptives, Winchell, 



N.H. 

 Foliation and sedimentation, 



Lawson, Winchell, A. 

 Lingula, etc., in red quartzite, 



Winchell, N. H. 

 Geology of Mankato, Bechdolt. 

 Glacial moraines, of Minnesota, 



Upham. 



Minnesota^Coutiuued. 



1889. Granites of the Northwestern 



States, Hall, C. W. 



Iron region, 1888, Winchell, H. V. 



Natural gas, Winchell, N. H. 



Observations in northeastern 

 Minnesota, Grant, U. S. ; Win- 

 chell, N. H. 



Phosphorus in Ludington mine, 

 Browne. 



Irving and the Keowatiu series, 

 Winchell, N. H. and H. V. 



Origin of ores of the Keewatin, 

 Winchell, N. H. and H. V. 



Quartz-keratophyre, Pigeon 

 Point, Bayley, W. S. 



Stillwater deep well, Meades. 



Stratigraphy of the Hnronian, 

 Winchell, N. H. 



Lithology of the Trenton at Min- 

 neapolis and St. Paul, Hall, 

 C.W. 



Two systems in the Huroniau, 

 Selwyn, Winchell, A. 



Origin of the Vermillion iron 

 ores. Van Hise. 



Studies of Archean, Winchell, A. 



Field studies in Archean, Win- 

 chell, A. 



Analyses of rooks from Meno- 

 minee River, Riggs. 



Analyses of rocks from Pigeon 

 Point, Riggs, Hillebrand,Whit- 

 fleld, J. E. 



Relation of rocks on Pigeon Poiut, 

 Bayley. 



Report on Rainy Lake region, 

 Lawson. 



Building stones, Merrill, G. P. 



1890. Deserted gorge near Minnehaha 



Falls, Grant, U. S. 

 Geological Survey, report for 1888 



reviewed, Dana, J. D. 

 Analysis of brick clay. New Ulm, 



Chatard. 

 Lineage of Lake Agassiz, Todd. 

 Loess and its fossils, Shimek. 

 Macfarlane's Railway Guide, 



Hall, C. W. ; Upham, Winchell, 



N.H. 

 Origin of rooks. Pigeon Point, 



Bayley. 

 Origin of Keewatin ores, Win- 

 chell, N. H. and H. V. 

 Position of Ogishke conglomerate, 



Winchell, A. 



