4 relative dating principles
When found in rocks as far away as Australia you could reasonably expect those rocks to be the same age as those in Cliviger Valley!
At Thornton Force the junction is marked by a basal conglomerate.
These ages have been derived from relative dating and absolute dating (radiometric dating) of rock layers and fossils.
(a) Relative Dating This technique uses principles of stratigraphy (rock strata) and the study of fossils (palaeontology) to determine the relative ages of rocks and sediments. Field geologists' rely on a number of simple techniques for dating rocks and constructing geological successions. The Law of Strata Identified by Fossils is a little bit more complex.
In the Grand Canyon, there is a gentle tilt of the bedding CC BY-SA 3.0], via Wikimedia Commons' src=" alt="The red rocks are layered, the dark rocks are not." width="300" height="225" srcset=" sizes="(max-width: 300px) 85vw, 300px"/via Wikimedia Commons' src=" alt="The three rock layers are shown." width="300" height="225" srcset=" sizes="(max-width: 300px) 85vw, 300px"/All three of these formations have an erosional unconformities at the two contacts between them.
The pinching Temple Butte is the easiest to see, but even between the Muav and Redwall, there is an Wikimedia Commons' src=" alt="The rocks are mostly red." width="300" height="224" srcset=" sizes="(max-width: 300px) 85vw, 300px"/The theory that the outer layer of the Earth (the lithosphere) is broken in several plates, and these plates move relative to one another, causing the major topographic features of Earth (e.g.