GL102 Lecture Notes - Lecture 3: Mafic, Hematite, Calcite
Document Summary
Lecture 3 - gl 101- finishing up chapter 1 and starting chapter 5. Average elevation is 840m above sea level. Average depth is 3800 m below sea level. Earth"s four spheres are linked as a system through their interactions. Earth"s system is powered by energy from the sun and heat from earth"s interior. Our actions produce often large-scale changes in all four spheres. The rock cycle: part of the earth system. The process by which one rock changes to another rock: metamorphic, igneous, sedimentary. Each rock type is linked to each other. Plate tectonics mountain building and volcanic activity all contribute to elevation of parts of earth"s surface. The physical breakdown (disintegration) and chemical alteration(decomposition) of rock at or near the earth"s surface. Transfer of rock and soil downslope by gravity. Physical removal of material by water, wind, or ice. Breaking rocks into smaller pieces by physical forces. Involves chemical transformation of rock into one or more new compounds.
