They have been slowly recycled over millions of years.This is called the rock cycle.Sedimentary rocks form when tiny particles of rock that have been weathered and eroded settle out of slow moving ...

Almost all fossils are preserved in sedimentary rock. Organisms that live in topographically ... formed and recycled into other types of rock in a process called the “rock cycle.” This makes the rock ...

"The fact that so many places are missing the sedimentary rocks from this time period has been one of the most puzzling features of the rock record," said C. Brenhin Keller, an assistant professor ...

THE GEOLOGY OF the Olympic Peninsula offers a fascinating glimpse into the massive forces of nature that shaped this land into one of the most complicated rock piles in the world.