What happens when one limb of a recumbent fold slides forward and overrides the other fold?
Options:
The fold becomes a reverse fold
The fold becomes a nappe
The fold becomes an autochthonous nappe
The fold becomes an exotic nappe
Option: B
The upthrust part of an overthrust fold is called
Options:
Nappe
Compressive force
Thrust plane
Recumbent fold
Option: A
What happens when the compressive force becomes so acute that it crosses the limit of the elasticity of the rock beds?
Options:
The limbs of the fold break at the axis of the fold
The limbs of the fold become parallel and horizontal
The limbs of the fold become acutely folded
The limbs of the fold become reverse to the normal structure
Option: A
The four major nappes identified in the Alps mountains are
Options:
Helvetic nappe, Pen nine nappe, Austride nappe and Dinaride nappe
Himalayan nappe, Garhwal nappe, Shimla nappe and Kumaon nappe
Recumbent nappe, Reverse nappe, Autochthonous nappe, and Exotic nappe
Structural window nappe, Complete window nappe, Open structure nappe and Overriding nappe
Option: A
The resultant structure when the broken limb of the fold is thrown several kilometres away from its original place and overrides the rock beds of the distant place is known as
Options:
Nappe
Structural window
Compressive force
Reverse fold
Option: A
An exotic nappe forms
Options:
When the broken limb of a fold overrides the other fold near to the broken fold
When the limb of a fold, after being broken, overrides the other fold at a distant place
When the overthrust part of a fold is called nappe
When the resultant structure becomes reverse to the normal structure
Option: B
What is a structural window?
Options:
The structure that becomes uncontormal to the original structure
The open structure that is seen when the portion of lower nappe is exposed because of denudation of overriding nappe
The plane along which one pan of the fold is thrust
The result of complex folding mechanism caused by intense horizontal movement and resultant compressive force
Option: B
Where have a few examples of nappes been traced out besides the Alps mountains?
Options:
Himalayas
Rocky Mountains
Andes Mountains
Appalachian Mountains
Option: A
What is crustal fracture?
Options:
A type of rock formation
A displacement of rocks along a plane due to tensional and compressional forces acting either horizontally or vertically or sometimes in both ways
A type of fault formation
A type of earthquake
Option: B
What causes the formation of faults?
Options:
Movement of rock blocks in a vertical direction only
Erosion of crustal rocks
Movement of rock blocks in a horizontal direction only
Tensional movement caused by the endogenetic forces
Option: D
What is the difference between a joint and a fault?
Options:
A joint is a fracture in the crustal rocks with appreciable displacement, whereas a fault is a fracture in the crustal rocks with no appreciable movement of rock.
A joint is a type of fault, whereas a fault is a fracture in the crustal rocks with appreciable displacement.
A joint is a fracture in the crustal rocks with no appreciable movement of rock, whereas a fault is a fracture in the crustal rocks with appreciable displacement.
There is no difference between a joint and a fault.
Option: C
What is fault dip?
Options:
The angle between the fault plane and horizontal plane
The angle between the fault plane and vertical plane
The angle between the foot wall and hanging wall
The displacement of rock blocks along a plane
Option: A
What is fault scarp?
Options:
A type of fault formation
The displacement of rock blocks along a plane
The steep wall-like slope caused by erosion of crustal rocks
The steep wall-like slope caused by faulting of the crustal rocks
Option: D
What determines crustal fracture?
Options:
The strength of rocks and intensity of compressional forces
The strength of rocks and intensity of tensional forces
The age of rocks and intensity of tensional forces
The age of rocks and intensity of compressional forces
Option: B
What is the difference between dip-slip movements and strike-slip movements?
Options:
Dip-slip movements occur in the direction of the dip, while strike-slip movements occur in the direction of the strike of the fault plane.
Dip-slip movements occur in the direction of the strike, while strike-slip movements occur in the direction of the dip of the fault plane.
Dip-slip movements occur in both the directions of the dip and strike, while strike-slip movements occur only in the direction of the dip.
Dip-slip movements occur only in the direction of the strike, while strike-slip movements occur only in the direction of the dip.
Option: A
What are the two types of faults based on the direction of slip or displacement?
Options:
Dip-slip faults and strike-slip faults
Reverse faults and wrench faults
Normal faults and oblique slip faults
Right-lateral faults and left-lateral faults
Option: A
What is a reverse fault?
Options:
A fault formed due to the displacement of rock blocks in opposite directions
A fault formed due to the movement of both fractured rock blocks towards each other
A fault formed due to the horizontal displacement of rock blocks along the fault plane
A fault formed due to the combination of normal and wrench faults
Option: B
What is the difference between normal faults and reverse faults?
Options:
Normal faults are formed due to compressive force, while reverse faults are formed due to tensional force.
Normal faults cause extension of the faulted area, while reverse faults cause shortening of the faulted are
Normal faults are formed due to the movement of both fractured rock blocks towards each other, while reverse faults are formed due to the displacement of rock blocks in opposite directions.
Normal faults have a fault plane inclined at an angle between 40 degree and the horizontal, while reverse faults have a fault plane between 45° and the vertical.
Option: B
What is a step fault?
Options:
A fault formed due to the displacement of rock blocks in opposite directions
A fault formed due to the movement of both fractured rock blocks towards each other
A fault formed due to the horizontal displacement of rock blocks along the fault plane
A series of faults that occur in such a way that the slopes of all the fault planes of all the faults are in the same direction
Option: D
What is a rift valley?
Options:
A long and narrow trough formed by the displacement of crustal parts and subsidence of the middle portion between two normal faults.
A mountain range formed by the collision of two tectonic plates.
A depression in the ocean floor caused by volcanic activity.
A circular basin formed by the erosion of a volcano.