Column A Column B but are slowed and refracted at the mantle / core 1.Pass through both mantle and core. A Mantle boundary at a depth of 2900 km A B Crust 2. The semi-solid (jello-like) material underlying the crust Extends down to about 3000 km depth CP-Waves D S-waves 3. Solid- based on speed of P-wave travelcomposed of same materials as outer core. Important for generating Earth's magnetic field E Inner core are F. Outer core 4. Wave that not transmitted through the liquid outer core. 5 Crust that is most abundant, consists of rocks formed from mafic magma, very dense; very thin 10 km thick G Oceanic crust 6. The rigid outer shell of the Earth, composed of solid rock very thin- averages only 20 km thick (the crust is part of the Lithosphere).​