From the Cretaceous,Maastrichtian.
Collected from Montana,Powder County,USA.
Very nicely colour banded,Crocodile tooth,from the Hell creek Formation,a rather beautiful specimen.
This is a really good sized piece of matrix, with lots of other remains definitely some fish and likely quite a lot more inside!
This specimen represents a lakes edge,or Delta, where there has been a build up of detritus,over a long time.
Maybe even the possibility of some Dinosaur material inside!