Structural geology . the fault displacement is horizontal and thereis no fault scarp, or where the fault scarp has been worn down byerosion. It will be noted that the classification of faults into normal orgravity and reverse or thrust faults, takes account only of apparentrelative displacement in a vertical section normal to the fault takes no account of horizontal or oblique displacement. Itexpresses merely the present relations of the beds in a two dimen-sional cross section rather than in three dimensions. It tells usnothing of the actual displacements of the beds. Hinge or pivota
Structural geology . the fault displacement is horizontal and thereis no fault scarp, or where the fault scarp has been worn down byerosion. It will be noted that the classification of faults into normal orgravity and reverse or thrust faults, takes account only of apparentrelative displacement in a vertical section normal to the fault takes no account of horizontal or oblique displacement. Itexpresses merely the present relations of the beds in a two dimen-sional cross section rather than in three dimensions. It tells usnothing of the actual displacements of the beds. Hinge or pivotalfaulting about an axis normal to the plane of faulting may producea fault which on one side of the pivotal axis would be called normaland on the other side reverse, and yet there may not be any differ-ential movements in the centers of the mass of the two parts ofthe faulted body (Fig. 23). A purely horizontal displacement mayappear either as a normal or reverse fault at any one place, de- NOMENCLATURE OF FAULTS 33. Fio. 15. Perspective view and vertical section of a thrust fault. After Willis.
Size: 2718px × 919px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1913
