Here's a random geology picture that I came across on my phone from 2016. It is of Dinosaur National Monument from an airplane as I was flying over. From this angle you can really see the structure of the whole park with a great view of Split Mountain, the mountain in the middle of the photo.
|An anticline fold. |
|A plunging anticline.|
In Dinosaur National Monument, the plunging anticline is here running left to right (west to east) and is plunging towards the left (west). If we look at a geological map of the area, the ages of the rock units will be able to confirm that with. In this instance the oldest rocks should be on the right (eastern and upper) part of the plunge and the youngest rocks on the left (western and lower) part of the plunge.
|Rock units outlined and labeled in Dinosaur National Monument|
Although it is hard to tell, the labels have two parts. The first 1 or 2 letters stands for the age of the rock unit. Here is also a better geological map of Dinosaur National Monument.
- "M" = Mississippian
- "PP" = Pennsylvanian
- "P" = Permian
- "Tr" = Triassic
- "J" = Jurassic
- "K" = Cretaceous