GEOL 1001 Chapter : Geology Class 1
Document Summary
Continents older - thicker crust and lithosphere 30 km 70 km more felsic/silicic less dense. Ocean younger - thinner crust and lithosphere 6 km more mafic more dense. Mechanical layers inner core (most solid) outer core (mostly liquid and magnetic field) mesosphere () asthenosphere (mostly solid but flows better than litho) lithosphere (outermost section of the plate super solid and moves as one) Compositional layers core (iron) - mantle (silicate with iron) crust (silicate but less iron) Mafic lots of fe and mg less si less quartz and silica - darker. Felsic lots of si less fe and mg less iron/magnesium - lighter. Plate tectonics earth"s lithosphere is divided into plates that are internally ridged and constantly in motion. Plates interact at plate boundaries, causing earthquakes, volcanoes, mountains, and more. Three types of plate boundaries: divergent moves away from each other constructive, convergent plates move toward each other - destructive, transform plates move sideways past each other - conservative.
