Name describe two principles used relative dating rocks
) is an earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time.
Geology can also refer generally to the study of the solid features of any terrestrial planet (such as the geology of the Moon or Mars).
Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in.
And, what about other findings like fossil fish, plants and insects?
Along the way, we'll learn how stratigraphic succession and radioactive decay contribute to the work of paleontologists.
Consider the following scenario: Paul the Paleontologist is a very famous scientist who has studied dinosaur bones all over the world.
There are younger geologic deposits in Grand Canyon too, such as the Ice Age fossils found in caves, a 1000-year-old lava flow in the western canyon, and even the debris flow deposits that continue form each year.
Yet, it is the canyon’s rock walls that allow people to develop their greatest perspective on geologic time, because of these rocks’ immense age, their fossil record, and because these rocks formed in environments far different than those found in northern Arizona today.