EOSC 114 Lecture Notes - Lecture 5: Subduction, Rift Zone, Oceanic Crust

• School: UBC
• Department: Earth and Ocean Sciences
• Course: EOSC 114
• Professor: Brett Gilley

Document Summary

Compare and contrast between the 3 types of plate tectonic boundaries and their sub- types. Distinguish between the three main types of faults and identify the stresses that cause each. Understand which faults are the most common type at each type of plate boundary, and which plate boundaries produce the largest quakes. Link brittle and ductile deformation to where earthquakes happen and how large they can be there. Distinguish between the three main types of faults (normal, reverse, strike-slip) and identify the stresses that cause each. For slow plate motions, force is applied slowly. So deformation is gradual (failure can be sudden) Earthquakes (faulting - brittle fractures) can only occur in the lithosphere. most continental plate earthquakes occur in the upper 15 km. The asthenosphere (and lower mantle) is too ductile for brittle faulting from slow mantle convection forces. Convergent boundaries are the strongest cool rock and in compression.