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.
Computer Randomly Shuts Down: Possible Reasons. If your laptop or computer shuts down by itself randomly, then there can be many possible reasons for it. Knowing the problems due to which your PC keeps shutting down frequently will help you deal with them accordingly. Reason #1: Virus Infiltration.
And it certainly only applies while the computer is running. If the computer's powered down, it has no way to tell the external drives it's time to shut down now. Even with the power on, the drives themselves automatically turn off after some period of inactivity.. That's why I say it kind of depends on what your external drives do when they get bored, as I call it.