832 THE GEOGRAPHICAL SIGNIFICANCE OF FLOODS, 



topographical relief and " torrent tracks " would be marvellous; 

 while in the more mature or even senile topography of the 

 Central and Eastern United States, one would expect such heav}' 

 thrusts to be of extremely rare occurrence, and confined to 

 gorges, to valleys facing the advancing ice-sheet, and to similar 

 points at which convergence and, thereby, velocity is emphasised. 

 Especially important then is the necessity for understanding 

 perfectly the state of dissection attained in preglacial time. 

 Only in this manner may the work of the great local ice-eddies 

 be appreciated. 



LITERATURE. 



(1) Andrews, E. C. — (a) The Ice-Flood Hypothesis of the New Zealand 



Sound Basins. Journal of Geology, Chicago, xiv. 1906, pp. 22-54. 



(6) The New Zealand Sound (and Lake) Basins and the Canyons of 



Eastern Australia in their Bearing on the Theory of the Peneplain. 

 Proc. Linn. Soc. iV. *S'. Wales, 1906, xxxi. pp. 499-516. 



(2) Bkigham, a. p. — Glacial Erosion in the Aare Valley. Bull. Geol Soc, 



Am. ii. 1899, pp. 589-592. 



(3) Chamberlin, T. C— (a) Joimu Geology, ii. 1894, pp. 517-539, 649-667,. 



768-789. 

 (h) Op. cit. iii. 1895, pp. 61-70, 198-219, 469-481, 565-583, 668-682, 



833-844. 

 {c) Op. cit. iii. 1896, pp. 582-593. 



(4) Chamberlin and Salisbury — (a) — Text-book of Geology, i. 



(5) Culver, G. E. — (a) The Erosive Action of Ice. Trans. Wisconsin Acad, 



Set. Arts and Letters, x. 1895, pp. 339-366. 



(6) CusHiNG, H. P. — (a) Notes on the Muir Glacier Region, Alaska, and its 



Geology. American Geologist, viii. 1891, pp. 207-231. 



(7) David, T. W. E.— Evidence of the Glaciation in late Cainozoic time at 



Kosciusko. Report Aiist. Assoc. Adv. Sci., ix. Hobart, 1902, pp. 202- 



204. 

 David, T. W, E., Helms, R., and Pittmann, E. F.— Geological Notes on 



Kosciusko, with Special Reference to Evidences of Glacial Action. 



Proc. Linn. Soc. N. S. Wales, 1901, xxvi. pp. 26-74. 

 (9) Davis, W. M. — (a) Glacial Erosion in France, Switzerland and Norway.. 



Proc. Boston Soc. Nat. Hist. xxix. 1900, pp. 273-322. 

 (b) Glacial Erosion in the Valley of Ticino. Appalaohia ix. 1900, 



pp. 136-156. 

 (c) The Sculpture of Mountains by Glaciers. Scott. Geog. Mag,. 



Jan., Feb., 1906. 



