What type of fossil are most dinosaur remains?
The type of fossilization of dinosaurs is most accurately called permineneralization. where the original material is replaced by a mineral or stone. An example of this type of fossil is fossilized wood where even the rings of the tree can be seen in the rock that has replaced the wood.
However the Smithsonian May 2006 released the information that Mary Schweitzer had discovered organic material inside of fossilized dinosaur bones. How organic material could still exist in fossils dated at 68 - 75 million years old is a mystery. Mineralization of organic material can happen very rapidly but that organic material existing for millions of years seems unlikely.