FAULTS

WHAT IS THIS?

WHO WILL WIN THIS? ROUND 1

THE SECOND BEST ROUND

THE SECOND BEST TEST RUN SCORER

THE SECOND BEST GOOGLE INDIAN 2011

THE SECOND BEST TAMIL MOVIE GROSSER

THE SECOND PRIME MINISTER OF INDIA

THE SECOND MAN TO SET FOOT ON MOON

THE SECOND MOST IMPORTANT REASON FOR EARTHQUAKES

TECTONIC PLATES

A MATTER OF DEPTH

FAULTS

FAULTS ARE ONE OF THE STRUCTURAL FEATURES OF ROCKS

WHILE ROCKS AT OR NEAR THE SURFACE OF THE EARTH ARE COOL & BRITTLE, ROCKS BELOW THE SURFACE OF THE EARTH ARE HOT AND TEND TO MOVE

FAULTS

A LOT OF EXTERNAL FORCES ACT UPON THE ROCKS AND CAUSE STRESS ON THEM

DUE TO THIS STRESSES, ROCKS EITHER UNDERGO DUCTILE DEFORMATION OR BRITTLE DEFORMATION

IF THEY UNDERGO DUCTILE DEFORMATION, ROCKS DEVELOP FOLDS. IF THEY UNDERGO BRITTLE DEFORMATION, THEY DEVELOP FAULTS.

FAULTS

FAULT IS DEFINED AS A SPLIT OR CRACK OR FRACRTURE IN THE ROCK PRESENT IN EARTH’S CRUST CHARACTERISED BY RELATIVE DISPLACEMENT OF ONE SIDE OVER THE OTHER.

FAULTS

FAULTS

FAULT LINE

A FAULT LINE IS THE INTERSECTION OF A FAULT PLANE AND EARTH SURFACE

IT IS THE SURFACE TRACE OF A FAULT

FAULTS

FAULTS

TYPES OF FAULTS

FAULTS ARE CLASSIFIED INTO THREE TYPES NAMELY

DIP SLIP FAULTS (VERTICAL MOTION) STRIKE SLIP FAULTS (HORIZONTAL

MOTION) OBLIQUE SLIP FAULTS (OBLIQUE

MOTION)

TYPES OF FAULTS

DIP SLIP FAULTS

Normal Faults (Extension)

Reverse Faults/Thrust Faults (Compression)

NORMAL FAULTS

REVERSE FAULTS

STRIKE SLIP FAULTS

Left Lateral

Right Lateral

LEFT LATERAL FAULTS

RIGHT LATERAL FAULTS

OBLIQUE SLIP FAULTS

SIMPLE DIAGRAMATIC REPRESENTATIONS

SYMBOLS FOR FAULTS

FAULTS & EARTHQUAKES

FAULTS CAN CAUSE TREMENDOUS EARTHQUAKES

THE ORDER OF CAUSE AND IMPACT OF EARTHQUAKES

STRIKE SLIPOBLIQUE SLIPDIP SLIP

FAULTS & EARTHQUAKES

ELASTIC REBOUND THEORY

ELASTIC REBOUND THEORY

ELASTIC REBOUND THEORY

ELASTIC REBOUND THEORY

The elastic rebound theory is an explanation for how energy is spread during earthquakes. As plates on opposite sides of a fault are subjected to force and shift, they accumulate energy and slowly deform until their internal strength is exceeded. At that time, a sudden movement occurs along the fault, releasing the accumulated energy, and the rocks snap back to their original undeformed shape.