Relative rock dating worksheet
Example: the layer that marks the extinction of dinosaurs has characteristics of an asteroid impact.
Ways of Measuring Absolute Time Tree rings- every year a tree grows a new ring.
When a violent eruption of a volcano occurs it may send dust high into the atmosphere where it can spread over the entire planet.
It settles out of the air and forms a layer over wide regions at the same time. The remians of the impact site in Mexico as seen by satellite imagery.
When the tree dies, the rings can be counted and events such as forest fires can be dated.
(Evidence of the same fire may be seen as a layer of ash in the rocks to correlate a rock layer with the tree rings).
Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old.
Relative age dating also means paying attention to crosscutting relationships.
Say for example that a volcanic dike, or a fault, cuts across several sedimentary layers, or maybe through another volcanic rock type.
In a way this field, called geochronology, is some of the purest detective work earth scientists do.
There are two basic approaches: relative age dating, and absolute age dating.
A relative age dating activity answers Online dating speech outline And Radiometric Dating What Is The Difference Between Relative Dating That have been generated in a rock since its formation to determine the age of .