Is this another theory taught as fact in our public schools?
There are stromatolites of very obvious biologic origin (mounds of layered sediment and bacteria) very similar to stromatolites growing today in Australia, in rocks reliably dated to over 3 billion years old.
We don't have an actual Young-Earth Creationist sighting now, do we? It's always sort of cute and quaint when they pop up, don't see them too much anymore.