Craters are very useful in relative dating; as a general rule, the younger a planetary surface is, the fewer craters it has. What can be dated? Now, what if instead of being horizontal, this rock layer was found in a tilted position? In geology, when an igneous intrusion cuts across a formation of sedimentary rockit can be determined that the igneous intrusion is younger than the sedimentary rock. The forest layer is younger than the mud layer, right?
As organisms exist at the same time period throughout the world, their presence or sometimes absence may be used to provide a relative age of the formations in which they are found.
Two of the most common uses of melt inclusions are to study the compositions of magmas present early in the history of specific magma systems. What can be dated? These foreign bodies are picked up as magma or lava flows, and are incorporated, later to cool in the matrix. Nevertheless, they can provide an abundance of useful information. Conditions of Fossil Preservation: Your Cart is Empty.