To increase the amount of virtual memory go to Control Panel > System > Advanced > Performance > Settings > Advanced > Virtual Memory Change > Custom Size > adjust as needed. 2 times your physical RAM is a good minimum and 3 times your physical memory in MB is good for your maximum.
Mafic lavas are lavas rich in iron and magnesium, while being low in silica. Basalt is the solidified version of mafic lava. Mafic lavas are the most common lava type on earth. Mafic lavas are also the hottest lavas and normally erupt at over 900 degrees Celsius - that's 1,650 degrees Fahrenheit!
Types of volcanic materials. Three basic kinds of materials may erupt from a volcano: 1) lava, (2) rock fragments, and (3) gas. The material that erupts depends chiefly on how sticky or fluid a volcano's magma is.Lava is the name for magma that has reached the earth's surface.omposite volcanoes are formed when both lava and tephra erupt from a central vent. The materials pile up in alternate layers around the vent and form a towering, cone-shaped mountain. Composite volcanoes include Japan's Mount Fuji; Mayon Volcano in the Philippines; and Italy's Vesuvius.