What general rock type are fossils usually found in?
On the back, summarize the general stratigraphic column with names and ages.
100 million years ago: How was the Goose Rock Formation formed?
What types of animals lived in the John Day area at that time?
50 million years ago: What are these deposits called?
What types of animals lived in the John Day area at that time?
35 million years ago: What started to happen to the west?
Why didn't the plant and animal remains decay?
15 million years ago: What happened. Why are there no fossils in these layers?
12 million years ago: What was the climate like at this time?
What types of animals lived in the John Day area at this time?
How was the Mascall Formation formed?
8 million years ago: What happened in the John Day area?
What is this formation called and why is it so prominent in the John Day area?
What has happened since that time to expose the fossils?
What may happen in the future?
Return to Video Study Guide Index