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Geology > Geological Structures > Flashcards

Geological Structures Flashcards

1
Q

What is confining stress?

A

Equal force applied , compacts rock

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2
Q

What is differential stress?

A

Unequal stress
Can be tensile = fault and joint
Compressional = fault and joint
Shear (twists) = fault

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3
Q

What is strain?

A

Deformation of rock

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4
Q

What is plastic deformation?

A

Rocks deform easily

Permanent

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5
Q

What is elastic deformation?

A

When stress is removed the strain disappears

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6
Q

What factors effect stress and strain?

A

Temp-higher temp means more plastic the rocks, colder means it is brittle and will fracture
Confining pressure- more pressure = more strength
Time- more pressure means more plastic

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7
Q

What is a competent?

A

Strong + brittle and joint + fault
No/ little plastic deformation
Eg sandstone

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8
Q

What is a incompetent rock?

A

Weak and plastic and fold and develop cleavage

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9
Q

What is stress?

A

Force applied to a rock / by area

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Geology (7 decks)

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