Glossary

Density-the state or quality of being dense; compactness; closely set or crowded condition

Isostasy-Equilibrium in the earth's crust such that the forces tending to elevate landmasses balance the forces tending to depress landmasses.

Plate techtonics-a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past adjacent plates.

Expanding-To increase the size, volume, quantity, or scope of

Strikeslip-the component of slip on a fault parallel with the linear extension or strike of the fault.

Compressing-To make more compact by or as if by pressing

P waves-the first waves to spread out from the epicener;moves in back and fourth motion

S waves-the second waves to spread from the epicenter;moves in a wave tipe of motion

Epicenter-Also epicentrum. Geology. a point, directly above the true center of disturbance, from which the shock waves of an earthquake apparently radiate

Stress-the physical pressure, pull, or other force exerted on one thing by another; strain.

Tension- the act of stretching or straining.

Fault-Geology, Mining. a break in the continuity of a body of rock or of a vein, with dislocation along the plane of the fracture (fault plane).

 

 

 

 

 

 

 

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