One thing is for sure, you won't find any native dinosaur bones. But there are fossils among the glacially deposited rocks; you can find Ordovician coral, brachiopods, even petrified wood. In the overburden dumps of coal mines you can find a rich variety of Pennsylvanian Age plant life, in particular fern fossils and tree bark. In parts of northern and southern Illinois, areas of marine sedimentary rock are exposed as outcrops. These are rich fields of ancient marine fossils including shark teeth, blastoids, crinoids, formanifera, and even trilobites in certain areas. EDIT: There are several relatively small areas where other sorts Cretacious fossils can be found (near Quincy, Illinois and Far-Southern Illinois). However, it is difficult to find exposed rock in these areas, checking for local quarries/exposed rock areas is the best bet although I have never done this myself. If you CAN get into a quarry in the right area (check a geologic map of illinois) you can possibly find these cretacious fossils--shark/fish teeth, bones of fish/reptillians, rarers items have been found such as peices of dinosaurs but it is doubtful that many will be found. Mazon creek is an easily accessible area for fossils, but it takes patience to find them there--jellfish (boring)...but good finds are fossilized bark, ferns/plants, RARE: fish, Spiders, insects, tully monster, etc...
The Illinois state fossil is the Tully Monster, discovered by Francis Tully in 1958. The Tully Monster was named state fossil in 1989.
Hadrosaurus.
Igneous rocks.
There are four types of fossils that can be found. These are true fossils, mold fossils, trace fossils and cast fossils.
small ones mainly
pertrified fossil.
Fossils are never found in Igneous rocks
Igneous rocks.
fossils
Drumheller Alberta- is kind of the central of dinosaur fossils.
There are four types of fossils that can be found. These are true fossils, mold fossils, trace fossils and cast fossils.
Igneous rocks.
small ones mainly
Insects.
uranis
artic
Fossils are most likely to be found in sedimentary rock.
A place where fossils are found. Not the kind of thing we sleep on though.
For a variety of reasons, most fossils are found in sedimentary rock.