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• Strike slip fault block diagram plus#

Some very important implications as you will see. In reality and at larger scales faults are typically non-planar! This has In a map view it is easy, but incorrect, to think that this would be a strike-slip fault. Block diagram to the right shows an example of how a dipping layer that is displaced by pure dip-slip movement will have a strike-slip separation.YouĬan have a horizontal separation and no strike-slip movement distinction between separations and slip components.

If you click on here you should have a page size version that you can print. Here is an unlabeled diagram that you can use to practice and develop your understanding of basic fault geometry. Is just one place that trig functions come in useful (as you will see in lab). Since the triangle formed by these three vectors is by definition a right triangle, this

Strike slip fault block diagram plus#

Total (net) slip vector = strike slip vector plus dip-slip component vector. Realize, however that the actual path of movement through time could be zig-zag and more complicatedm and that there is an infinite number of possible paths between the hanging wall and footwall piercing points. connecting peircing points provides the total net slip vector.For example, if a fault crosses a channel sandstone in a formation, then there are two piercing points. piercing ponts are where a disctinve linear feature gets truncated by a fault.cut-off lines are where a layer gets truncated by a fault, and for a given offset layer there are two such cut-off lines on either side of the fault.In this case, the following components are used to describe This means that cutoff lines by themselves are not adequate to allow the direction and amount of motion on the fault to be determined. Note that there is an infinite number of lines that potentially connect the two cutoff lines. Dipping layers will usually have plunging cutoff lines associated with them. This diagram depicts a simplified case of horizontal layers that are offset. The diagram to the right visits the basic geometry and terms you should become familiar with. Truncated layers, as depicted in the simplified diagram to the right. fault recognition criteria in the fieldĭescription of idealized fault componentsįaults or a smaller portion of a fault can sometimes be idealizedĪs a planar surface with a vector of slip in it and offset and.fault breccia, gouge, flinty crush rock, pseudotachylites.The rocks here are more mafic in composition, which is thought by some to promote pseudotachylite formation. The slip here is parallel to the gneissic layering seen in theĪdjacent rocks. (violet arrow), and a chloritized fault breccia (yellow arrow). Slip surface with secondary associated, high angle oblique microfaults To the scaling of various fault parameters.įigure is from a core drilled into basement rocks of South CarolinaĪnd shows a pseudotachylite injection vein (red arrow), a pseudotachylite Reading in Fossen, Structural Geology textbook, pages 119-126, and 135-138, 151-185.