Overview
Watch this 25 minute video on "relative age dating" to understand what to do here. A bonus from this video is the discussion given on unconformities, which might help you for your video project due this week. I strongly suggest that you look at that assignment and its related videos before starting this discussion assignment.
For the questions below, it is best if the entire group works together. You will need information about sedimentary environments, types of metamorphism, unconformities, and relative age dating to answer these questions.
1) In the figure above, order the lettered items from oldest to youngest along the side of the diagram. Answer on the left in the spaces provided, oldest at bottom to youngest at top (or give the sequence in your reply indicating which is oldest and youngest). Everyone in the group needs to work together on the answer to this. Consider answering questions 2-6 below the figure before you attempt the sequence if you are stuck.
2) Are there any unconformities in the figure? If so, specify what letter corresponds to any unconformity present and name the type of unconformity.
3) What is L?
4) Use depositional environments (Chap. 7) to describe what this area in the figure must have been like when P, A, and K were deposited?
5) Is the Igneous Rock in layer W from a lava flow or an intrusion? Explain your answer.
6) Using the geologic time scaleLinks to an external site., during what era were S, F, and H formed?