Geologists are like detectives. We are trying to piece together the story of how and when the rocks formed and how and when they have moved. Every rock has a story to tell about the environment when it formed. The rocks in these mountains also tell the history of motion on faults underground.
Next I try to figure out what story rocks can tell us about plate tectonics. I use my special compass to measure how the sedimentary rocks have tilted and I make a map. My map tells us which way the rocks have folded and that tells us which way they’re being pushed by plate tectonics.
Here's a dramatic photo of folded rock I borrowed from someone else's geology blog so that you can see a really clear example. (http://www.itsasickness.com/geology/content/folded-rock)
I really enjoyed reading all your questions and comments, thanks for all the great ideas for new blog posts! Here's a brief food update:
I was served rice in a banana leaf last week, and yesterday we got to have pineapple for dessert!