Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1882 edition. Excerpt: ... erosions (not farther explained), (d) clefts; second, proximate or incidental, the effect of (a) glacial action, (b) subsequent eruptions, (c) drift, (d) damming by drift-wood, (e) beaver dams, (f) irregular subsidence or elevation. There are areas of numerous lakes, but it is not well determined why--perhaps because they are new lands; and areas of no lakes, where the barriers are worn down. In composition: fresh, having overflow, in northern regions that have been glaciated, but relation of effects to cause has not been clearly set forth; salt, in dry regions, no overflow. No examples by name. This paper as published seems too condensed to do justice to its author. Jukes and A. Geikie. Manual of Geology, Edinburgh, 1872, p. 460. Most lakes are in rock-basins, and in northern parts of the globe, in greatly denuded regions; basins are of recent origin. They are found first, behind barriers of superficial accumulations, (a) gravel from side stream, (b) land slips, (c) moraines, (d) irregular deposits of detritus as (1) among morainal mounds, (2) among dunes, (3) on drift or boulder clay, (4) between volcanic cones, (5) in craters, maare, (6) lava dams. Second, in rock basins formed (a) by depression of upper part of valleys (suggested but not admitted), (b) by local subsidence as Dead Sea and perhaps lakes of Central Africa, (c) by sinks, as turloughs of Galway, (d) by ice erosion, for the vast majority of lakes in the Northern hemisphere. A. Geikie. Elementary lessons in Physical Geography, London, 1879, -65. Less explicit than the above, being adapted to younger students. Lakes occur in inequalities in the land surface; many in northern Europe and America; basins in rock, in superficial detritus, behind moraines, in depressions on..
