National Parks as a Classroom: "The Stretch" at Dartmouth
By far the most favored segment of The Stretch, the "National Parks Segment" alone takes students through roughly 1,500 miles of the American West, visiting the country's most famous National Parks. The Stretch is a field program offered by the Dartmouth Earth Sciences Department, unlike any other in the world. The program is ~10 weeks long and traverses across the entire Western United States. This blog shares some info on the fourth segment of The Stretch: The "National Parks" Segment (Geochemistry and Hydrology).

If you've ever wanted to visit some of the Nation's most beautiful National Parks with 20 of your best friends—along with studying a little bit of science along the way—The Stretch might just be your chance to do it. Starting in Yellowstone National Park and ending near the Sierra Nevadas, this segment took us through five breathtaking national parks in just around a week and a half! On our way, we completed assignments and research experiments to learn about how these parks formed where they are, the amazing geochemical and hydrological processes behind their beauty, and of course, to see some of the most beautiful places on Earth.

Starting in Yellowstone, we spent a few days learning the basics of hydrology and geochemistry. Everyone knows Yellowstone is famous for its geysers and large hot springs, so there's quite literally nowhere better in the world to learn the basics of stream chemistry interactions than here. Days involved visiting famous sites in the park such as the Grand Canyon of Yellowstone, the Mammoth Hot Springs, and of course, the world famous Old Faithful Geyser. Along the way, however, we also collected many samples (something Yellowstone only allows a handful of institutions to do—one of which is Dartmouth) and took hydrological measurements for data that we later analysed in assignments after the day of sightseeing. Some assignments included calculating the ion concentrations and speeds at which hot spring formations grew, or using terrace stratigraphy to track historical river and flooding behaviors in the region.

Following Yellowstone, we made our way to Jackson Hole, Wyoming. Here, we spent several days visiting Grand Teton National Park and studying the active tectonics that have shaped (and continue to shape) the entire Teton Range. In addition, staying in a hostel in Jackson Hole was certainly one of my favorite locations we stayed. Normally a buzzing ski town in the winter, Jackson Hole was nothing but a ghost town with just a few people around during this time in the season. In many ways, we had the entire town to ourselves, and spent our free time hiking and going for runs on the ski slopes above us, as well as making trips into the nearby Grant Teton National Park.

During days in the field, we would hike through thick woods up the sides of the Tetons to conduct fault scarp mapping and earthquake magnitude calculations (our professor had every location memorized). By combining field measurements with physical models, we were able to estimate the size of past and current earthquake risk in the region.

From there, we continued south to Dinosaur National Monument, where we shifted from tectonics to sediment transport and river dynamics—also taking some time to study prehistoric dinosaur tracks! For these three days, we camped in tents at a campsite right next to the Green River. Nights were spent working on our assignments calculating sediment flux and how rivers respond to changes in discharge under different climate conditions. Our final project here was even studying the physics of dinosaur locomotion based on nothing but preserved fossil tracks, and calculating if we could outrun a dinosaur (spoiler: you can't).

The final stop of the "National Parks" Segment brought us to Great Basin National Park. Here, we studied cave formation and groundwater flow, learning about the processes that have carved some of the deepest limestone caves in North America. We stayed at a ranch hidden in a canyon nearby. This ranch was quite literally the only evidence of civilization for miles in any direction. However, if you want to see the best geology, you have to go to places regardless of people nearby, and that can often mean staying in the middle of nowhere! Although, locations like this resulted in a tight-knit group dynamic that kept our Stretch group extremely close.

On this segment of The Stretch, America's National Parks become your classroom for about two weeks. In these places, the subjects you'll study in many cases, were often discovered and pioneered in these very locations. Dartmouth's professors, returning and teaching here every year for The Stretch, know each and every thing there is to know about the geology here—and also all the spots with the best views. It's no surprise this segment is students' favorite on The Stretch.
If you'd like to know more about The Stretch, take a look at my blogs on other segments of it!
Martin