How do imprint fossils form?
Imprint Fossils are formed when an organism leaves behind tracks, which are then preserved. This means the tracks are collected after they have dried and they are then covered by other sediments. Get detailed information on http://www.ehow.com/facts_5155010_imprint-fossil.html and http://www.ehow.com/about_6328717_imprint-fossils-formed_.html.
Over millions of years. You won't be making one in your backyard anytime soon.
they r called trace remains, but yes they take a very long time to mak brah