It's amazing to see what we can learn from ancient rocks.
It seems each one tells its own story.
The first Stegosaurs fossils and footprints were found in Morrison, CO, USA. Interestingly, ancient sedimentary rocks (sandstone, mudstone, claystone, etc...) were sitting on the surface waiting for us to find them and recognize them.
Incredibly, they we're buried for a long time and brought back up by tectonic plates?! So, they survived underground deep in the Earth?!!
