- 1.0: Introduction to Rheology
- An understanding of rheology is crucial for understanding important concepts in geophysics, such as what happens during an earthquake, how mountains and faults are formed, and how rocks behave in the mantle. Rheology is an important concept in structural geology and can help geophysicist to make observations about what forces lead to the creation of a geologic structure, and how those forces may act over a regional scale.
- 1.2: Elastic Deformation (2-D)
- In geology, we measure strain without knowing about the applied stress or type of deformation (elastic, viscous) the rock experienced. So how do we get from the observed strain to the magnitude of stress causing the deformation? We can first investigate the type of deformation, which is either elastic or viscous. Elastic deformation is shallow and has a low magnitude of strain.
Thumbnail: A vertical viewpoint of a rock outcrop that has undergone ductile deformation to create a series of asymmetric folds. (CC BY 2.0; Mike Beauregard via wikipedia).