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!
Different types of lava have different chemical compositions. Since not all rocks have the same chemical composition and lava is just liquid rock, it does not have an official formula. Most rocks (and therefore lava) are made up of a combination of the elements Oxygen, Silicon, Aluminum, Iron, Calcium, Sodium, Potassium, and Magnesium. Different types of rocks (and lava) have different amounts of these elements. Therefore, there is not a specific chemical formula for lava. Different types of lava have different chemical compositions. Since not all rocks have the same chemical composition and lava is just liquid rock, it does not have an official formula.