Fossils

I think that this is a Mold and Cast. I think this because it is an indentation/hollow spot in the rock. This picture resembles the fossil of the fish that I have under this and they have certain similarities that makes me believe that this falls under the molds and casts category.

Molds and Casts:  I think that this fossil belongs in the molds and casts because in the reading it says that a molded fossil is a hollow depression in the rock, and this image clearly shows that it's hollow.  It also says that fish, leaves, and ferns are commonly found fossils that classify as Molds and Casts.