Strike-slip faults are defined as faults in which faulted blocks have been moved against each or in an essentially horizontal direction. The fault plane is almost vertical and net slip may be measured in great distances.

When in field same layer or rock is encountered more than once in a certain section, that is, it is repeated in space, faulting is indicated. Similarly, omission of certain of beds in some directions as proved by thorough study of stratigraphy of region, is also indicative of faulting.

The faulted rocks will form weak foundations and abutments for dam, despite fact that originally y might have been strong and impervious.

The slip is furr distinguished on basis of direction of displacement with respect to fault as dip-slip, strike-slip or oblique slip. Hade slip is not one such.

Faults of any significance are always associated with earthquakes. The tectonic history of area under consideration must be known thoroughly.

The mutual relationship of attitude of fault and of disrupted rock has also been used in some cases for classifying faults into three types: dip faults, strike faults and oblique faults.

The embankment of Bhakra dam in India showed occurrence of numerous shear zones in m; site could not be changed because of or reasons; hence it was decided to treat shear zones by extensive excavations of shear zones and back filling with cement grouting.

Fault zone is a small region with definite thickness and distinct composition having numerous closely placed parallel fractures within itself along which re have been clear displacements.

Repetition of strata occurs, when downthrow is against direction of dip of bed in which faulting has taken place.

The large-scale movement of nappes may be attributed to a major thrusting or a recumbent folding followed by thrust faulting.