Talk:Limestone Pie and Marble Pie/@comment-26951190-20151031054236/@comment-27161581-20160304211919

The only requirement for a sedimentary rock is for the grains to be cemented together with some kind of mineral, usually calcite, silica, etc. Though I'm sure you already know this, but you may not know that this can be done in a few hours artificially. Cement is technically a sedimentary rock. A sedimentary rock can also contain metamorphic rocks. Such as this particular type of conglomerate, which contains quartzite.

Compression can result in chemical changes, as it is a method of adding energy to an equation, by definition it can cause chemical change under some circumstances. I do not deny that. Perhaps my use of "fancy" was misleading, I will be sure to remedy that.

To make my argument clear, it is fully possible to sand-blast some quartzite, add some concrete, and make a sedimentary rock. Just as metamorphism does not need a long time to occur, the forming of sedimentary rock, does not require any specific duration of time.

(shrug)