A couple of weeks ago, Kat and I began our big geology project. We learned a lot about the geological history of Arizona and even took our lessons to the field! While examining the outcrops around us, we talked a lot about the layers of the Earth and plate tectonics. We talked about how layers of the crust may have been thrust upwards as plates moved into each other (uplift) and how some layers would sink under others as they moved lower to the mantle (subduction). However, as I was explaining these concepts to my daughter, I realized that she would have a much easierRead More →