Relative age dating concepts No premium text sex chat
The Geologic Time learning objective — based on NGSS and state standards — delivers improved student engagement and academic performance in your classroom, as demonstrated by research.
Scientists look at minerals that show up in the rock, its texture, its environment, and the processes that formed it — like volcanic eruptions or river deposits — to help piece together geologic history.
If a fault cuts a rock layer, then the rock layer is older than the fault. (The previous layers are eroded off at the top too.) So the event after the intrusion is EROSION A. So your answer for the relative ages, or sequence of events, would be: P, K, M, S, X, intrusion R, erosion A, B, J, F.
For example in the diagram below, the sedimentary units are in sequence, P, K, M, S, and X. A body of magma (INTRUSION R) has intruded or cut through all of the previous layers. Now that you've followed the steps involved to determine the relative ages of the rock layers in the above cross section, try your hand at putting the rock layers in sequence yourself.
Click OK and it will give you the number correct, the number left blank, and the number wrong.
In this series of games, your students will learn about the earth’s geologic timeline and how scientists find and use clues to color in the details of our planet’s history.
When organisms die, they leave behind skeletons, tracks, and other evidence that gets preserved in the rock, forming fossils.