Respuesta :

Snowpaw
Mold fossils ( foddilized impression made in the sunstrate).
Cast fossils, formed when mold is filled in.
Trace fossils = ichnofossils (fossilized nest, gastroliths,
Footprint, burrow, etc..
I found this on internet or google
Mold fossils- Made in sunstate.
Cast fossils- Formed when mold has been filled in.
Trace fossils- Burrow.