A new campaign was undertaken by Justinian's nephew Germanus Justinus, but he died in 551 CE, succeeded by the general Narses. In 553 CE, Narses defeated Totila and Italy was once again Roman. Justinian's reign lasted almost 40 years, but it was not always popular.
Volcanism is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics and volcanic gases erupt through a break in the surface called a vent.ome of this magma may cool extremely rapidly and will form volcanic glass (rocks without crystals) such as obsidian. Magma that remains trapped below ground in thin intrusions cools slower than magma exposed to the surface and produces rocks with medium-sized crystals.
Surface Geologic Processes also reffered to as, Exogeneous Geologic Processes, are the processes that operates on the Earth's surface and helps to reconstruct the Earth extern â¦ ally. They include, Erosion, Weathering, Mass Wasting, Orogeny. Their agents are called the Epigeal Geological Agents, and include, Wind, Water, Glacier, Waves etc.