Penny Blood: Serial Sensation and Working-Class Entertainment — page 152: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

CH. x. | DISTURBED TRACT. 135 ocean is abnormally deep; and of these the deeper is upon the side where the ndge is steeper. That this will be the case is obvious, on account of the position of the centre of gravity of the tract being half way between PQ and RS. When atmospheric influences begin to act on the ridge, and denudation comes into play, we may expect that the principal and longer streams will be formed on the east side, which is less steep. The crest of the ridge will then be lowered, the basset edges of the contorted strata exposed, and the material removed will be deposited on the low grounds, and along the shore line, more on the east side than on the west. We must remember however that our diagram represents only a section across an isolated ridge. But it will be proper to contemplate the existence of other elevated tracts, which, either by rivers flowing from them, or by ocean currents, or by shore drifts, or by iceberg deposits, may contribute to the deposition of sediment to the east of the ridge. For instance, in the case of a section taken from Valparaiso to Buenos Ayres, we should need to consider the sediment brought down by the Rio de la Plata, which would not be derived from any area crossed by the line of section. In endeavouring to trace the mechanical results of such ~ denudation and deposition, let us call # the material denuded off the ridge A, and 2 that brought from some distant region and deposited along with a. If we assume the centre of gravity of the tract to be originally at G, then the denudation of the material x off A, and its transference towards the east, will shift this centre towards the east. The deposition of the additional sediment z, brought from a distance and deposited along with or near a, will have a like additional effect. Let G’ be the position to which this centre is shifted. If the crust were flexible, this would produce deformation, and an alteration of curvature on either side of G’; but it would not tend to cause rotation. Since however it is only partially flexible, the deformation will proceed as far as the forces acting will carry it, and when they can bend it no further, GONG oOo SS (CO)