Penny Dreadfuls, 1897 · page 225 of 316
Penny Blood: Serial Sensation and Working-Class Entertainment — page 225: what you’re looking at
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CHAPTER XVI. ON FAULTING. Faulting due to contraction—“ Hade to the downthrow’’—Faulis may die out in the depths—The fissure which gives rise to the fault—Fissure will have the same hade as the fault—Course of fault in a straight line--Fissures which cause faults commence at the surface—Fauilis of Utah described by Captain Dutton—Faulting superimposed on corrugation—Extent of throw of great faultse—Faults will not usually admit the fluid magma—If they do so may give rise to fissure eruptions of igneous rock — Application of datum-level equation to faulting — Faulting must depress the tract affected—General theoretical conclusion respecting the connection of fault- ing and corrugation, BESIDES corrugation the strata of the earth’s surface have been extensively affected by faulting. This has been usually, and probably correctly, attributed to the contraction and con- sequent shortening of the crust over those areas where it occurs; for by faulting a portion of the crust is enabled to occupy the same horizontal area after contracting, that 1t did before, without gaping fissures being formed in it. » The well-known fact that faults commonly “ hade to the downthrow,” which in untechnical language means that the divisional plane, which constitutes the fault, inclines downwards towards the side upon which the corresponding beds are found at a lower level, appears to be explicable in the following manner. If we had a series of superimposed beds perfectly homogeneous each in itself, and each having its upper and under side strictly parallel and horizontal, and if contraction were to commence in these at the upper surface, it is conceivable that vertical cracks might be formed in them, dividing the whole area into COLA @ NOOKS ACO