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Block faulting - ridges produced by tilting of blocks.

Block Faulting

Block faulting - ridges produced by tilting of blocks.

Block faulting - region of horizontal strata intersected by vertical fissures.

Block Faulting

Block faulting - region of horizontal strata intersected by vertical fissures.

"Section showing displacement of strata by a fault. a and a were once a continuous mass of rock." -Whitney, 1911

Displacement of Strata

"Section showing displacement of strata by a fault. a and a were once a continuous mass of rock." -Whitney,…

"Section of a clean-cut fault." — Encyclopedia Britannica, 1893

Fault

"Section of a clean-cut fault." — Encyclopedia Britannica, 1893

"Section of strats, bent at a line of fault." — Encyclopedia Britannica, 1893

Fault

"Section of strats, bent at a line of fault." — Encyclopedia Britannica, 1893

"Reversed fault, Liddlesdale." — Encyclopedia Britannica, 1893

Fault

"Reversed fault, Liddlesdale." — Encyclopedia Britannica, 1893

"Plan of strata cut by a dip-fault." — Encyclopedia Britannica, 1893

Fault

"Plan of strata cut by a dip-fault." — Encyclopedia Britannica, 1893

Fault in the round tower of Terranuova in Calabria occasioned by the earthquake of 1783.

Fault in Terranuova

Fault in the round tower of Terranuova in Calabria occasioned by the earthquake of 1783.

An illustration of a clean-cut fault.

Clean-cut Fault

An illustration of a clean-cut fault.

Diagram illustrating drag of strata along a fault plane.

Drag

Diagram illustrating drag of strata along a fault plane.

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect to the rock on the other side. Here, the arrow indicates the downthrow side.

Gravity Fault

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect…

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect to the rock on the other side. Here, the arrow indicates the downthrow side.

Gravity Fault

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect…

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect to the rock on the other side. Here, the arrow indicates the downthrow side.

Gravity Fault

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect…

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect to the rock on the other side. Here, the arrow indicates the downthrow side.

Gravity Fault

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect…

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect to the rock on the other side. Here, the arrow indicates the downthrow side.

Gravity Fault

A fault is a planar fracture in rock in which the rock on one side of the fracture has moved with respect…

A thrust fault is a type of fault, or break in the Earth's crust with resulting movement of each side against the other. Here, the arrow indicates the upthrust side.

Thrust Fault

A thrust fault is a type of fault, or break in the Earth's crust with resulting movement of each side…

A thrust fault is a type of fault, or break in the Earth's crust with resulting movement of each side against the other. Here, the arrow indicates the upthrust side.

Thrust Fault

A thrust fault is a type of fault, or break in the Earth's crust with resulting movement of each side…

A thrust fault is a type of fault, or break in the Earth's crust with resulting movement of each side against the other. Here, the arrow indicates the upthrust side.

Thrust Fault

A thrust fault is a type of fault, or break in the Earth's crust with resulting movement of each side…

A thrust fault is a type of fault, or break in the Earth's crust with resulting movement of each side against the other. Here, the arrow indicates the upthrust side.

Thrust Fault

A thrust fault is a type of fault, or break in the Earth's crust with resulting movement of each side…

An illustration of a trough fault.

Trough Fault

An illustration of a trough fault.

Diagram illustrating various types of fault.

Various Types of Fault

Diagram illustrating various types of fault.

When a single large mass of rock is caught between two faults it is spoken of as a "horse."

Horse

When a single large mass of rock is caught between two faults it is spoken of as a "horse."

"Outcrop showing faults, spur south of Deadwood." -Walcott, 1901

Outcrop

"Outcrop showing faults, spur south of Deadwood." -Walcott, 1901

Diagrammatic section showing the overthrust at the northern end of the Hudson Highlands. The main overthrust on the right brings the crystallines above the Hudson River slates.

Hudson Highlands Overthrust

Diagrammatic section showing the overthrust at the northern end of the Hudson Highlands. The main overthrust…

Section through North Hill, Kingston, N.Y. showing the overthrust which led to a repetition of the strata.

North Hill Overthrust

Section through North Hill, Kingston, N.Y. showing the overthrust which led to a repetition of the strata.

Diagram showing passage of thrust fault into fold.

Thrust Fault into Fold

Diagram showing passage of thrust fault into fold.