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Spring 2021
This thesis presents two studies employing computational approaches to tephra source attribution and tephra volume estimation. Glass major oxide data was used to train 11 classification algorithms. Each classifier probabilistically attributed tephra chemistries to one of ten volcanic sources from...
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Fall 2021
Cryptotephra research is one of the fastest growing subfields of tephrochronology. Here the extraction, processing, and analytical techniques required for cryptotephra studies are reviewed and assessed in detail. A workflow is suggested depending on the site’s characteristics to improve the...
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Spring 2013
In this dissertation, tephrostratigraphy is used as the central method to address issues of chronology in the late Quaternary sedimentary record of eastern Beringia (non-glaciated Yukon and Alaska) at a variety of spatial and temporal scales. The Palisades, central Alaska, preserves...