left lateral vs right lateral strike slip fault

A transform fault refers to larger strike-slip faults associated with plate boundaries and spreading ridges. If it moves to the left relative to your position, then it is a left lateral fault. If the opposite side has moved to the right relative to your position, that is called a right lateral fault. Pretend that you are standing on one sied of a strike slip fault:Ī. Two types of strike slip faults can be distinguished by relative lateral motion of the fault. When the motion on a fault is more horizontal, then it is called a strike-slip or lateral fault. If the foot wall moves down relative to the hanging wall, then it is a reverse fault.Ģ.

If the hanging wall moves down relative to the foot wall, then it is a normal fault.ī. Two types of dip-slip faults can be distinguished by the relative movement of the hanging wall and foot wall of a fault.Ī. When motion on a fault is vertical, it is called a dip-slip fault. What are the different types of faults?ġ. Faults are often planar in orientation, which allows geologists to measure their strike and dip. right-lateral strike-slip fault, What kind of fault is visible in Figure 1 1.

But the movement can be right lateral (ground on opposite side of fault is moving right with. Study with Quizlet and memorize flashcards containing terms like Which fault will see the hanging wall move down relative to the footwall 1. The rock below the fault zone is called the foot wall.ģ. The main sense of slip across a strike-slip fault is horizontal. In a cross-section view of a fault, the rock above the fault zone is called the hanging wall.Ģ. are known as strike-slip faults and are classified as either right-lateral or left-lateral. A fault is a break in a rock mass along which movement has occurred. Where a right-lateral fault steps left or a left-lateral fault steps right, a contractional bend forms. When a right-lateral strike-slip fault steps right or a left-lateral strike-slip fault steps left, an extensional bend is formed. Rake>0 means the hanging wall moved up (thrust or reverse fault).I. A double bend is a simple type of strike-slip fault stepover. Rake=0 means the hanging wall, or the right side of a vertical fault, moved in the strike direction (left lateral motion) Rake = +/-180 means the hanging wall moved in the opposite direction (right lateral motion). Rake - the direction the hanging wall moves during rupture, measured relative to the fault strike (between -180 and 180 decimal degrees). faults and those with right-lateral motion as dextral faults. A left-lateral fault is one in which the movement of the far block of rock is to the left, and a right-lateral fault is one in which. 7.5: Stress and Strain - Geosciences LibreTexts What is a left lateral strike slip fault. For a vertical, strike slip fault (for which “hanging wall” has no physical meaning) we still call the right-side block the hanging wall to distinguish between right lateral and left lateral motion.ĭip - the angle of the fault in decimal degrees (0 to 90, relative to horizontal). Strike-slip faults can either be left-lateral or right-lateral. This is important because rake (which gives the slip direction) is defined as the movement of the hanging wall relative to the footwall.

This means that the hanging-wall block is always to the right. That is, the fault always dips to the right when moving along the trace in the strike direction (from one point to the next). Strike - the fault-trace direction in decimal degrees (0 to 360, relative to North), defined so that the fault dips to the right side of the trace. (adapted from page 106 of Aki & Richards (1980), Quantitative Seismology - Vol 1 )

Left lateral vs right lateral strike slip fault