More recently introduced terms such as 'annually laminated' are synonymous with varve. Of the many rhythmites in the geological record, varves are one of the most important and illuminating in studies of past climate change. Varves are amongst the smallest-scale events recognised in stratigraphy.
PCs are designed to shut down automatically when heat endangers the hardware. To find out if this is your problem, download and install Speedfan. It's small and free. Although Speedfan's basic job is controlling the speed of your PC's fans (you probably guessed that by the name), it also provides the CPU temperature.
Hereâs what to do about it. Chips and hard drives use electricity, and therefore generate heat. That heat can seriously damage the circuits inside your PC. Luckily, the computer is smart enough to shut itself down when it gets too hot, protecting itself from permanent damage. A PC that suddenly shuts itself down may be a lesser evil, but itâs still something you want to avoid.