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.
My Windows 10 Computer Randomly Shuts Down. After 20 minutes or so of being powered on and used, this HP Beats Windows 10 (AMD Core Processor) shuts down for no apparent reason. I'm not certain where to look to find an explanation or the cause of this problem such as log files so I'm looking for some help with this.