Answer and Explanation: There are two types of lithosphere: oceanic and continental. The oceanic lithosphere, which makes up almost two-thirds of the surface of the solid Earth, has been formed along the mid-ocean ridges during the past 180 Ma or so.The surface of the solid Earth is bimodal with a mean land elevation of 0.84 km, and a mean depth for the oceans of 3.8 km. The density of the lithosphere varies depending on temperature, depth and age. Use a spreadsheet to compute the weighted average density of the oceanic lithosphere, and see how it changes as the lithosphere ages and thickens. The density of continental lithosphere is too low for it to subduct. These same principles are then applied to the density of the oceanic lithosphere based on its two components: crust and mantle. Oceanin lithosphere is about 2.9g/ cm3 c m 3 in density and the continental... See full answer below. Compare the average density of the oceanic lithosphere with that of the underlying asthenosphere to determine if the lithosphere "sinks" or "floats" the density of the lithosphere is 3.6g/cm^3 No. The density of the continental (granitic) lithosphere is lower than oceanic (basaltic) lithosphere. At about 50 kilometers (30 miles) below the Earth's surface, density measurements reach 200,000 pounds per square inch (13,790 …