a block of lithoshpere that cosists of the crust and the rigid, outermost part of the mantle tectonic plate a small earthquake after a real earthquake aftershock the layer of rock between the earths crust and core mantle the central part of the earth below the mantle core the thin and solid outermost layer of the earth above the mantle crust the strong lower part of the mantle between the asthenosphere and the outer core mesosphere the solid outer layer of the earth that consists of the crust and te rigid upper part of the mantle lithosphere the soft layer of the mantle on which the tectonic plates move asthenosphere the solid dense center of our planet that extends from the outer core to the center of the earth which is about 6380 km beneath the surface inner core the outer core is the liquid layer of the earths core that lies beneath the mantle and surrounds the inner core outer core science