I have found myself in the last few months tagging or retagging some questions with time-based tags (namely precambrian and carboniferous). I realize now that nobody else did, and thus was wondering what is the community thought on them: do you think there is a need for them?
The reason I added them (and therefore think they are needed) is that I often look (on Google Scholar for instance) for epoch-specific information and thus limit my search using stratigraphic terms, and I naturally thought of doing the same here eventually.
