Glacier because ice sheet and stuff and science ill explain more in the comments
Sedimentary rocks form when new sediments are deposited on top of older rock
Some producers are Water Ivy, some "river grass" and many more organisms.
Scientists continuously find fossilized bodies of dinosaur bones that all appear to have died the same way. It is because of these discoveries that we know that dinosaurs and other pre-historic species existed on Earth 66 million years ago.
