GEOLOGY 1 Lecture Notes - Lecture 11: Schist, Feldspar, Orogeny
Document Summary
To understand the different types of foliations. To have a basic understanding of how they form. To recognize bedding-cleavage relationships and from this, be predictive on fold type and geometry. A term used to describe any planar feature that occurs penetratively in a body of rock. May refer to thin rhythmic bedding in a sedimentary rock, compositional layering, flow fabrics in igneous rocks, cleavage, schistosity, or other planar deformation structure. Compositional layering may be product of deformation, but in most rocks, typically compositional layering is the primary fabric (bedding) Common practice to label foliation using a subscript system based on order with which foliations is formed. Generally s0 is reserved for primary structures (bedding) Successive tectonic fabrics are then labeled s1, s2, s3, etc. Foliations are primarily the product of some combination of. Bulk shortening or flattening (pure shear strain component) that is accommodated by dissolution/solution transfer and form with folding.
