Scientists have thought that magmas that form new crust at fast-spreading ridges rise up from the depths, quickly crystallize, and then push away from the ridge to form new ocean floor.
To stop a computer from overheating never keep a cloth or something else on the CPU or monitor. Also use the save energy option from properties so as to switch off the monitor when not in use. This will always help in keeping the computer cool and not overheating it.
When a laptop is set on a soft surface such as a bed or carpeting, the fan intake vents for air (which are usually located on the bottom) to cool the cpu/gpu are blocked, resulting in little airflow, causing overheating and possible damage to the cpu/gpu.