Earth exhibits many examples of tectonic deformation on all scales, from brittle continent-size to micro-faults to spectacular plastic structures that form at or near the surface, to structures at all scales that form at great depths in the Earth, largely the product of plate tectonics.  Processes that operate on Earth’s surface modify Earth materials and their response to deformation processes.  Non-tectonic structures are produced by the impact of extraterrestrial objects with Earth, which originate inside or outside our solar system.  We will have a field trip near the end of the term and will discuss the processes that produce the forces/stresses on Earth and how/why specific kinds of structures (faults, fractures, folds, etc.) form as a result.