Rose here –
A year ago I got the chance to visit the Grand Canyon National Park. I had been there once as a toddler, but of course I didn’t remember it, so I was very excited to have the opportunity to go again now, especially since I’ve been studying geology for a few years. The Grand Canyon is like Disneyland for geologists. There are SO many cool geologic processes and so much geologic time represented there (click here for a fun read on the geology).
We were staying in Flagstaff, AZ for a conference, but my colleague and I had a free day before it started and since the Grand Canyon is only an hour and a half away we decided to just hop in the car and go. We started off early in the morning so we could try and beat the heat. When we arrived we headed straight to the rim.
It was one of the most exciting moments of my life. I had seen pictures of the canyon, but nothing prepared me for what it was actually like to stand there in person. We walked up to the rim with our eyes on the ground so we would see it all at once. When we got close enough we looked up and were utterly speechless for at least a minute. It was so worth it. The Grand Canyon is so big. Like, SO BIG. Apart from all the cool geology, it is a really amazing view.
One of the coolest things about the Grand Canyon (besides the size) is how you can really see textbook examples of geologic concepts displayed in a way that anyone can see. For example, the Great Unconformity is a famous example of an unconformity – a place where rocks were deposited or uplifted and then some time passed and/or erosion occurred before more rocks were deposited. The Great Unconformity is the place where the beautiful sedimentary rock layers that make up most of the Grand Canyon are deposited on top of older metamorphic and igneous rocks. The distinct sedimentary rocks layers we see exposed in the canyon help geologists understand what the environment was like at different times in the past. After all these rocks were deposited, the canyon itself was carved out by the Colorado River starting at least 6 million years ago (click here for more information), resulting in the Grand Canyon we see today.
A note from the editor (Jen): I wholeheartedly agree with this description, the view is beyond breathtaking. It takes a while to soak in the awe inspiring beauty. Time is so often taken for granted but when you can see so much time in the rocks, it gives you a new perspective.