GLG 301 Lecture Notes - Lecture 1: Convergent Boundary, Silicate Minerals, Continental Crust
Document Summary
Minerals: inorganic solid with a specific internal structure of atoms and a definite chemical composition. Silicate minerals: minerals composed of silica (sio4) Mafic: said of rocks and minerals composed of silica, iron and magnesium. Felsic: said of rocks that are high in feldspar and quartz (or those minerals) Igneous: formed from cooling of magma (molten rock) Sedimentary: formed from fragments of preexisting rocks or fossils or precipitated from solution. Metamorphic: formed by subjecting pre-existing rocks to heat or pressure. Tectonics: referring to structure and deformation of the earth and the processes behind them. Oceans (salt) not covered much in this course. Seismic (speed at which earthquake waves travel) /chemical subdivision. Crust (0 to 6-40 km); silicate and other minerals. Outer (fluid; 2886 to 5156 km) inner (solid; 5156 to 6371 km) Result of chemical differentiation of the earth over geologic time. Rheologic (material behavior) lithosphere (rigid; 0 to 70-150; know ~100 km thick)
