Geology . oc. Bos. Soc. Xat. Hist. 1879, pp. 220-234,ibid., Vol. XXIV (1889), pp. 228-242, Geol. of X. H., Vol. Ill (1878), Am. X (Dec. 1892), pp. 339-360, and Bull. Geol. Soc. Am. Vol. Ill (1892), p. 142;Stone, Proc. Bos. Soc. Xat. Hist., Vol. XX (1880), p. 434,; Johnson, Trans. N. Sci., Vol. I (1882), pp. 78-89, and N. Y. Acad. Sci., Vol. II, pp. 249-266;Chamberlin, Geol. of Wis., Vol. I (1883), p. 283, Proc. Am. Assoc. Adv. Sci. 1886,p. 195, Third Ann. Rept. U. S. Geol. Surv., 1883, p. 306, and Jour, of Geol., Vol. I,p. 255-267; Dana, Am. Jour. Sci., Vol. XXII (1883), pp. 3
Geology . oc. Bos. Soc. Xat. Hist. 1879, pp. 220-234,ibid., Vol. XXIV (1889), pp. 228-242, Geol. of X. H., Vol. Ill (1878), Am. X (Dec. 1892), pp. 339-360, and Bull. Geol. Soc. Am. Vol. Ill (1892), p. 142;Stone, Proc. Bos. Soc. Xat. Hist., Vol. XX (1880), p. 434,; Johnson, Trans. N. Sci., Vol. I (1882), pp. 78-89, and N. Y. Acad. Sci., Vol. II, pp. 249-266;Chamberlin, Geol. of Wis., Vol. I (1883), p. 283, Proc. Am. Assoc. Adv. Sci. 1886,p. 195, Third Ann. Rept. U. S. Geol. Surv., 1883, p. 306, and Jour, of Geol., Vol. I,p. 255-267; Dana, Am. Jour. Sci., Vol. XXII (1883), pp. 357-361; Davis, ibid,,Vol. XXVIII (1884), pp. 407-416; Chalmers, Geol. of Can. Rept. 1881-9, Vol. IV,p. 23; Salisbury, Geol. Surv. of New Jersey, Rept. 1891, p. 74, and Glacial Geology of GEOLOGY, A terminal moraine (Vol. I, pp. *_)(.);) .501) is made where the edgeof the if*1 remains nearly stationary in position lor a considerableperiod <»l time. In constitution ii may be very like the adjacent ground. Fig. 49G.—Drumlins .shown in contour near Clyde, N. Y. (U. S. Geol. Surv.) moraine, though there is often a larger proportion of stratified driftassociated with it. In topography it is somewhat distinctive. It New Jersey, 1902; Lincoln, Am. Jour. Sci., Vol. XLIV (1892), pp. 293-6; Tyrrell,Bull. Geol. Soc. Am., Vol. I (1890), p. 402; Barton, Am. Geol., Vol. XIII (1894), ; Frank Leveret t, Monogrs. XXXVIII and XLI, U. S. Geol. Surv., and Russell,Amer. Ceol., Vol. XXXV (lr05), p. 177. THE PLEISTOCENE OR GLACIAL PERIOD. 363 sometimes constitutes a more or less well-defined ridge, though thisis not its most distinctive feature, since its width is generally great,relative to its height. A moraine 50 or even 100 feet high and a milewide is not a conspicuous topographic feature, except in a regionof unusual flatness. In such situations terminal moraines some-times constitute important drainage divides. The most distinctive feature of a well-developed terminal moraine
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