GEL 2 Lecture Notes - Lecture 9: Metamorphism, Gneiss, Laminar Flow
Document Summary
Regional metamorphism: the quantities of rock are subjected to directed pressures and high temperature associated with large scale deformation. Contact or thermal metamorphism: when rock is intruded by magma body. There is a change in temperature with the host rock surrounding a molten igneous body. Metamorphism cause many changes in rocks which include increased density, growth of large mineral crystals, reorientation of mineral grains into a layered or banded appearance known as foliation and the formation of new minerals. Foliated texture: layered or banded appearance: slate: fine grained, schisits, gneiss: banded metamorphic rocks that contain mostly elongated and granular. Non foliated texture: those which are only composed of one mineral that forms equidimensional crystals: marble, quartzite. Mass wasting: the downslope movement of rock, regolith, and soil under the direct influence of gravity. Water/hydrologic cycle: a summary of the unending circulation of the earth"s water supply. Infiltration: a portion of water from precipitation soaks into the ground.
