Here we tried to reproduce the global surface color of Venus as seen by the human eye based on radar imagery from the Magellan spacecraft and surface images by the Venera missions.There are no color global images of the surface of Venus due to its thick atmospheric coverage and colorized radar images are used instead.ere we tried to reproduce the global surface color of Venus as seen by the human eye based on radar imagery from the Magellan spacecraft and surface images by the Venera missions.
A volcano is a vent or chimney which transfers molten rock known as magma from depth to the Earth's surface. Magma erupting from a volcano is called lava and is the material which builds up the cone surrounding the vent. A volcano is active if it is erupting lava, releasing gas or generates seismic activity.
1 Subduction is the process by which continental crust slides beneath another portion of crust. 2  The subducting crust melts and becomes magma, the material that fuels volcanic eruption. 3  The melted crust contains carbon in the sediments and soils, thus recycling it through the mantle of the earth. The melted crust convecting through the mantle will eventually resurface in the form of lava during eruptions from volcanoes. 2  These volcanoes were originally formed by tectonic forces--where there is an excess of magma below the crust due to subduction, it is forced to erupt. 3  The process of eruption includes degassing.