Since they are still viscous when sjected, they often have rounded, aerodynamic shapes. A lava dome is a dome-shaped mound that is formed around a vent by viscous lava. A lava lake is a lake of basaltic lava contained in a volcanic caldera. A lava tube is a tube-like, underground conduit formed by flowing lava. The lithosphere is the solid, rocky, outer part of the Earth consisting of the crust and the upper mantle .
Llithospheric plates are a series of slabs that make up the Earth's hard outer shell.
There are 16 major lithospheric plates that float on softer layers of the Earth's mantle. Greenwich, England has a latitude of zero degrees. The farther east or west of Greenwich you are, the greater your longitude. As stated in our privacy policy , we fully respect your privacy and will not use your e-mail address for any purpose other than the newsletter subscription.