Classification of Faults - Engineering Geology MCQs

Explanation: On the basis of net slip faults have the following three types : Dip Slip Fault, Strike slip fault, Oblique slip fault

Explanation: The faults in which the slip takes place along the direction of the slip is called dip slip fault in the dip slip fault net slip is parallel to the dip of fault.

Explanation: Reverse fault is one in which the hanging wall moves up relative to the foot wall due to compression. If the hanging wall is pushed up and then over the foot wall at a low angle it is called a thrust fault. Reverse faults with very shallow dipping fault planes (<10 degrees) are called thrust faults.

Explanation: A series of faults running more or less parallel to one another and all handing in the same direction, are called parallel faults.

Explanation: The emphasis in the case of faults based on apparent movement as basis is only on appearance because actually it may require to be established which of the two parts, hanging wall and the foot wall, has moved during faulting and by how much.

Explanation: The origin of horsts and grabens is believed to be due to lateral tension in the crust in most cases

Explanation: When a series of thrust faults occur in close proximity, thrust blocks are piled up one above another and all the fault surfaces dip in same direction. The resulting interesting structure is known as an imbricate structure.

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

Explanation: In normal faults, the fault plane may be inclines at any angle between horizontal and vertical, but most commonly, the fault angles are between 45° and vertical.

Explanation: By virtue of their inclination and direction of movement, reverse faulting involves shortening of the crust of the crust of the Earth (compared with normal faults).