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The strength of a material is exceeded,
and the material breaks or fractures.
and Types of Stress
The three types of stresses that rocks
commonly undergo are tensional stress,
compressional stress, and shear stress
When rocks are squeezed or shortened
the stress is compressional
Tensional stress is caused by rocks being
pulled in opposite directions
Shear stress causes a body of rock to be
distorted Types of Stress
Folds During mountain building, flat-lying sedimentary and
volcanic rocks are often bent into a series of wavelike
ripples called folds
The three main types of folds are anticlines, synclines,
Anticline – formed by the upfolding, or arching, of
Syncline – downfolds, or troughs, found in association
The angle that a fold or fault makes with the horizontal
is called the dip of the fold or fault
Monocline – lar...
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