English: This image shows the mass wasting process and layered crust on Io. The example is Euboea Mount on Io. The shape of Euboea Montes, especially the northern flank's thick, ridged deposit, is interpreted by Schenk and Bulmer as evidence of slope failure along the entire face of the northern flank. They call the deposit at the base of the mountain a massive debris apron made by a rock and debris avalanche. Rocks moved down slope without water, trapped air, or hot volcanic gases. The estimated volume of the debris apron is about 25,000 km3. If this is true, then Euboea Montes has arguably the largest debris apron in the Solar System. Landslides in Valles Marineris or around Olympus Mons on Mars are also vying for the distinction as the "largest" as are submarine landslides on Earth. Northern portion of the image shows layered crust labeled "layered plain". Interpretations from Schenk, P.M.; Bulmer, M. H. (1998).