Penny Blood: Serial Sensation and Working-Class Entertainment — page 147: what you’re looking at

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

130 DISTURBED TRACT. [cu. x. ances. Yet it is certain that these must have been governed by unerring laws resulting from a slight want of homogeneity in the material: and perhaps even, as the figures seem to suggest, from the local weakness caused by the horizontal lines, which had been traced upon the face of the clay before compression. In the case of Prof. Favre's experiments the compression was uniform along the tract. In that which we are considering it would be otherwise. The pressure would increase until the crust gave way at one place. There it would be crushed up- wards and downwards, above and below the neutral zone, until the thickening had attained a certain limit, which would depend upon the rigidity of the material, its weight, and perhaps on the angle of repose. When this limit had been attained, a fresh region would be involved in the process; and this would probably adjoin the former. But as the lateral force expended itself, the thickness disturbed would become less and less, and the disturbance would gradually die out towards that side from which the movement came. } Since the portion of the crust which lay within the limits of the original thickness would suffer greater compression than the raised and depressed portions above and below it, being more in the direct line of the pressure, we might expect that the flexures would hang over towards the side from which the movement came, thus causing inversions of bedding. This phenomenon is common on the flanks of mountain chains, and especially marked in the Appallachians. In the explanation usually given, the pressure has been supposed to have come from the side, away from which the flexures incline: so that if the flexures incline towards the west, the movement is supposed to have come from the east’. According to the explanation now proposed the case would be the exact opposite, and if the flexures hang over towards the west, the movement came from the west. Where we find inverted bedding on both sides of an anticlinal, or a fan-shaped structure, we infer that a 1 Prof. Green’s Geology for Students, p. 377, with a reference to Silliman’s Journal, 1st Series, xix, 284, COMIC OOOKS.EO