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The Mystery Interval: hydrological changes and circulation pattern changes?

Norris, Nathaniel
http://rave.ohiolink.edu/etdc/view?acc_num=ucin156206011280431

Abstract Details

2019, MS, University of Cincinnati, Arts and Sciences: Geology.
The last glacial termination (18 to 11 thousand years before present-ka) was a period of abrupt climate changes hypothesized to be driven by changes in atmospheric circulation and the hydrological system (Denton et al., 2010). One such event of interest is the two-part Mystery Interval (Denton et al., 2006) from 17.5-14.5 ka; marked at 16.1 ka by a distinct hydrologic shift recorded by cave isotopes (Asmerom et al., 2010) and pluvial lake-level fluctuations (Broecker and Putnam, 2012) in western North America. In the mid-continent, loess deposition, reflecting wind patterns, slowed down or stopped at this time (e,g, Muhs et al., 2013). North of the Late-Wisconsin ice-margin, lake records are a common archive. Birks (1981) presents a late-glacial pollen record from Kylen Lake (47.337671° N, 91.809564° W) in northern Minnesota, detailing a variable late-glacial climate including a no-modern analog pollen assemblage, and up to 5% non-local Cretaceous pollen grains suggested to be sourced from over 400 km away in western Minnesota.
Thomas Lowell, Ph.D. (Committee Chair)
Andy Breckenridge, Ph.D. (Committee Member)
Aaron Diefendorf, Ph.D. (Committee Member)
70 p.
Geology
glacial geology; lake sediment; late glacial; mystery interval

Recommended Citations

Citations

  • Norris, N. (2019). The Mystery Interval: hydrological changes and circulation pattern changes? [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin156206011280431

    APA Style (7th edition)

  • Norris, Nathaniel. The Mystery Interval: hydrological changes and circulation pattern changes? 2019. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin156206011280431.

    MLA Style (8th edition)

  • Norris, Nathaniel. "The Mystery Interval: hydrological changes and circulation pattern changes?" Master's thesis, University of Cincinnati, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin156206011280431

    Chicago Manual of Style (17th edition)

ucin156206011280431
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This open access ETD is published by University of Cincinnati and OhioLINK.