GEOL 1001 Chapter : Chapter 2 Geology
Document Summary
Where compass needle points (matches with field line) Moves within 1500km of geographic north: magnetic declination. Angle between field line and earth"s surface. Some have magnetite (magnetic mineral: volcanic rocks (basalt, sedimentary rocks. Magnetic minerals align based on magnetic field; never going to change. Magnetite tells us what the magnetic field was when the rock formed. 9/4/2013 7:24:00 pm www. caelsu. edu/defaultasp: schedule exams 1 & 2, mylsu login, password=lsu id , himes hall. The ocean floor: ocean bathymetry: wwii sonar ocean floor continental shelf abyssal plain mid ocean ridge atlantic ocean, mid ocean ridge, plate boundary, usually symmetric, plates pull-apart, divergent. Younger crust new crust is being made at mid-ocean ridge. Young crust in center and older as it goes out: sediments are thinner. Name is based on relative motion of the two sides. Footwall: under fault, does not move. Hanging wall moves down relative to the footwall. Pull apart (divergent: reverse (thrust) fault. Hanging wall goes up relative to footwall.
