SIO 50 Lecture Notes - Lecture 10: Transform Fault, Parallelogram

• School: UCSD
• Department: Scripps Institution of Oceanography
• Course: SIO 50
• Professor: Geoffrey Cook

Document Summary

Sio week 4, lec 10 (post beach walk) Interested to see how roks behave when theyre stressed out basically. How rocks become deformed: tectonic stress leads to strain, taking a soda and compressing a soda can analogy. Forces (stresses) invovled in deformation: tension- pulling apart. Streth a body and tends to pull it apart: compression- pulling together. Squeeze and shortens a body: shear- twisting (torsion) Push two sizes in opposite directions (looks like a parallelogram: rocks will behave in a brittle or ductile function. Three types of deformation: ductile- plastic deformation. A little harder, usually smooth, hotter, a lot more capable of melting. Depth in crust dictates ductile vs. brittle. Ductile rocks bend or fold: brittle (breaks) Brittle rocks break or fault (fault is a plain of weakness: elastic- deforms, then returns to original form. Apply stress, deforms, takes stress away and goes back to original form, refer to elastic. Kind of bending like a micah but might actually break.