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The 2017 Seventeenth Annual UMM Undergraduate Research Symposium (URS) celebrates student scholarly achievement and creative activities. Students from all disciplines participate in the URS. Types of presentations include posters, oral presentations, and short or abbreviated theatrical, dance, or musical performances. 

Presentations are accompanied by discussions and multimedia.


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Saturday, April 22 • 10:00am - 12:00pm
Toward the Development of a 10Be Chronology of Glaciation in the Mosquito Range, Colorado: a Progress Report

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The Last Glacial Maximum (LGM) in the Rocky Mountain region occurred about 21 ka (20,000 years before present). However, dated glacial chronologies suggest that while LGM glacier advances in individual ranges in Colorado were somewhat synchronous, retreat from their maximum extents was asynchronous, varying between ~20 and 15 ka or later. The precise timing and spatial variation of glacier advance and retreat provides insights into LGM climate change and is necessary to calibrate climate models.
To better understand the timing of the LGM in the Mosquito Range in Colorado, we collected 12 samples from granitic boulders on moraine crests in the summer of 2016. Sample processing began in Fall 2016. Samples were crushed, sieved and subject to magnetic separation. Chemical processing is underway to further separate quartz grains, and ultimately to extract beryllium oxide (BeO) “targets.” Target will be analyzed for the concentration of 10Be, a cosmogenically-produced isotope, using accelerator mass spectrometry at PRIME Lab (Purdue University). 10Be concentrations will then be used to determine the age of the moraines and thus reveal the timing of the local LGM.


Saturday April 22, 2017 10:00am - 12:00pm
Student Center, Oyate Hall 600 E 4th St., Morris MN 56267