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Plate Tectonics > Lateral Forces > Flashcards

Lateral Forces Flashcards

1
Q

What is potential energy?

A

The amount of work or energy required to move a body against a potential gradient.

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2
Q

What are the main driving forces acting on the plates in PT?

A

Slab-pull force
Ridge push
Suction force
Mantle convection/flow force

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3
Q

What’s the formula for work?

A

Work = mass x gravity x height (unit:Joules)

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4
Q

What is the SI unit for Joules?

A

Newton metres

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5
Q

What is the formula for a normal stress at any arbitrary depth?

A

Newtons/metres squared

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6
Q

What is the potential energy of a rock at any given depth also known as?

A

Vertical normal stress

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7
Q

What is effective stress?

A

The stress that holds particles rigid, measured by subtracting the pore fluid pressure from the total stress.

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8
Q

What happens to the effective stress if the pore fluid pressure is increased?

A

The effective stress decreases - moves Mohr Circle to the left, therefore the failure criterion will be lower.

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Plate Tectonics (10 decks)

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