Rock: Bend, Buckle, and Break Why Is Rock Deformed? • Tectonics forces continuously squeeze, stretch, bend, and break rock in the lithosphere • Energy source: Earth’s internal heat – transformed into to mechanical energy Stress • Force per unit area • Units: – Pounds per square inch – Bars, kilobars, megabars – Pascals, MPa, GPa • Differential vs confining stress – Different stress in different directions – “pressures” Strain • Fractional change in dimension – Length – Angle – volume • Units: dimensionless
Rock: Bend, Buckle, and Break
Jun 23, 2023
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