96 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 135. 
588 Upham (Warren). The succession of Pleistocene formations in 
the Mississippi and Nelson River basins. 
Geol. Soc. Am., Bull., vol. v, pp. 87-100. 
Abstract: Am. Geol., vol. xii, pp. 170-171 (£.p.). 
Describes the Lafayette formation, the glacial drift and marginal 
moraines, and tbo loess and other modified drift deposits of the 
Mississippi Valley and Lake Agassiz and its deltas. Discusses the 
evidences of elevation prior and subsequent to the Glacial epoch. 
589 Pleistocene climatic changes. 
Geol. Mag., dec. iv, vol. i, pp- 340-349. 
Abstract: Am. Nat., vol. xxviii, p. 886 (£ p.). 
Reviews the history of the Glacial period in North America and 
discusses the causes of the climatic changes. 
589^ Tertiary and Quaternary stream erosion of North America. 
Abstracts: Am. Assoc. Adv. ScL, Proc, vol. xlii, pp. 181-183; Am. 
Geol., vol. xii, pp. 180-181 (£ p.). 
V. 
590 Van Hise (Charles R.). Summary of current pre-Cambrian North 
American literature. 
Jour, of Geol., vol. ii, pp. 109-118 and 444-454. 
Reviews recent papers on the pre-Cambrian strata of North America. 
591 The pre-Cambrian rocks of North America. 
Int. Cong. Geol., Compte Rendu, 5th session, pp. 110-150. 
This paper is condensed from the final chapter of Bulletin No. 86 of 
the U. S. Geologic Survey, Correlation Papers, Archean and Algonkian, 
and noticed in Bibliography and Index for 1892 and 1893. 
592 [Correlation ol clastic rocks.] 
Int. Cong. Geol., Compte Rendu, 5th session, pp. 167, 172, and 173. 
Remarks on the methods employed in the correlation of pre-Cam- 
brian rocks. 
593 Excursion to Lake Superior: pre-Cambrian geology of the 
Lake Superior region. 
Int. Cong. Geol., Compte Rendu, 5th session, pp. 489-512. 
Describes the relations of the Basement Complex, Lower Hnronian, 
Upper Huronian, and Cambrian in this region, and gives the author's 
general conclusions. Gives a list of 27 papers referring to the geology 
of the Lake Superior region. 
594 The succession in the Marquette iron district of Michigan. 
Abstract: Geol. Soc. Am., Bull., vol. v, pp. 5-6. 
Describes the stratigraphic relations of the formations of the region. 
595 Character of folds in the Marquette iron district. 
Abstract: Am. Assoc. Adv. Sci., Proc, vol. xlii, p. 171 (£ p.). 
The folding is described as resembling the fan structure of the Alps, 
except that it is a synclinorium rather than an anticlinorium. 
595a Correlation papers : Archean and Algonkian. 
Abstract: Am. Nat., vol. xxviii, p. 944 (f p.). 
Noticed in Bibliography and Index for 1892 and 1893. 
