The table represent the thickness, top density, and bottom density of the different layers of the earth. In most of the layers, the deeper the layer, the thicker and denser the layer becomes. Thickness (km) density (g/cm3) types of rock found top bottom crust 30 2. 2 2. 9 silicic rocks upper mantle 720 3. 4 4. 4 peridotite lower mantle 2,171 4. 4 5. 6 magnesium and silicon oxides outer core 2,259 9. 9 12. 2 iron+oxygen inner core 1,221 12. 8 13. 1 iron+oxygen at which location in earth’s interior exhibits a change in the trend? inner core outer core lower mantle upper mantle.