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Field Trips Valles Caldera and The Los Alamos Science Museum


Date: Sunday, September 11, 2016 Time: 7:30 am to 5:30 pm Cost: $115 Early/$135 Regular


(includes box lunch, snacks, water, transportation & museum entrance)


Leader: Fraser Goff and Cathy J. Goff


We are leading a field trip for AIPG to the Valles caldera with a brief stop at the Los Alamos Science Museum. The 2-km-diam- eter Valles caldera (1.25 Ma) is the world’s type resurgent caldera and erupted roughly 400 km3 of the famous Tshirege Member, Bandelier Tuff, radial outflow sheets of high-silica rhyolite ignim- brite. We will first stop at a location where partici- pants can view the tuff lap- ping into the Rio Grande rift. Then a short stop at the Los Alamos Science Museum where you can view detailed replicas of Fat Man, Little Boy and other LAB projects. Then a stop or stops within the caldera to appreciate its size and view 1000-m-high Redondo Peak, the resur- gent dome. After this, we’ll stop at the youngest intra-


Date: Sunday, September 11, 2016 Time: 8:00 am to 5:00 pm Cost: $115 Early/$135 Regular


(includes box lunch, snacks, water & tramway ticket) Leader: Adam Reed and Bruce Allen


Looking west of Redondo Peak, the 1000-m-high resurgent dome within the 1.25 Myr Valles Caldera.


This all-day trip to Sandia Crest will depart Santa Fe at 8 am and return around 5pm. Our bus will travel south on I-25 to the Sandia Peak Tramway in Albuquerque and will provide views of several interesting structures and sub-basins of the Rio Grande rift along the way. We will ride the tramway 4000 feet up to the crest of Sandia Peak at 10,200 feet above sea level. From the tramway station, we will take a moderate hike of about 1.5 miles, with spectacular views along the crest. Along the way, we will discuss the evolution of the Rio Grande rift, accommodation zones, rift flank uplifts, and whatever else we see of interest. At the end of our hike, we will reach a parking area where we can re-board our bus and drive down the dip- slope of the Sandias. Along the way we will stop to view a fine exposure of the Great Unconformity. Then we will continue back to Santa Fe along the Turquoise Trail (NM-14) through the old mining towns of Madrid and Cerrillos.


Bring good shoes for hiking, a small pack, sunglasses, a hat, and a camera. The hiking on this trip will be moderate and on a good trail, but this trip is at a high elevation. This can pose significant problems for some people, especially if they are com- ing from near sea-level.


Sandia Crest


Mock up version of the Fat Man atom- ic bomb. This and many other won- ders will be seen at the Los Alamos Science Museum.


caldera eruption, the Banco Bonito rhyolite lava (about 70 ka). And finally, we’ll examine the hot springs at Soda Dam, whose soothing waters are derived from the 300°C geothermal system within the caldera. Bring your camera, hat, sunglasses light sweater or jacket, sunscreen, and easy shoes.


4 TPG Apr.May.Jun 2016 www.aipg.org


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