Meaghan Wetherell

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Courses

Scholarly Contributions

Journals/Publications

• Emery-Wetherell, M. M. (2025). Burrow collapse is not the only explanation for rapid, noncatastrophic preservation of 3D dinosaurs. Proceedings of the National Academy of Sciences, 122(3), e2423019122.
• Emery-Wetherell, M., & Wang, R. (2023). How to use academic and digital fingerprints to catch and eliminate contract cheating during online multiple-choice examinations: a case study. Assessment & Evaluation in Higher Education, 1--16.
• Wetherell, L. R., Ely, L. L., Roering, J. J., Walsh, M. K., Burchfield, M. J., Nace, K. E., Wetherell, M. M., & Struble, W. T. (2021). Quantifying sedimentation patterns of small landslide-dammed lakes in the central Oregon Coast Range. Earth Surface Processes and Landforms, 46(7), 1375--1392.
• Wetherell, L., Ely, L., Roering, J., Walsh, M., Burchfield, M., Nace, K., Wetherell, M., & Struble, W. (2021). Quantifying sedimentation patterns of small landslide-dammed lakes in the central Oregon Coast Range. Earth Surface Processes and Landforms, 46(7). doi:10.1002/esp.5106
  More info

  Understanding sedimentation patterns in small coastal watersheds due to landscape perturbations is critical for connecting hillslope and fluvial processes, in addition to managing aquatic habitats for anadromous fish and other aquatic species in the Oregon Coast Range (OCR). Changes in sedimentation patterns spanning the last 250 years are preserved in two landslide-dammed lakes in small watersheds (< 10 km2) underlain by the Tyee Formation in the central OCR. Dendrochronology of drowned Douglas-fir stumps in both lakes provided precise timing of the damming and formation of the lakes, with Klickitat Lake forming in winter ad 1751/52 and Wasson Lake in winter ad 1819/20. Perturbations from wildfires, logging and road development, and previously underappreciated snow events affect sedimentation rates in the lakes to different degrees, and are identified in the sediment record using cesium-137 (137Cs), high-resolution charcoal stratigraphy, local fire records, and aerial photography. Each lake has variable sedimentation accumulation rates (0.05–4.4 cm yr−1) and mass accumulation rates (0.02–1.42 g cm−2 yr−1). Sedimentation rates remained low from the landslide-damming events until the mid-19th century, when they increased following stand-replacing wildfires. Aside from a sediment remobilization triggered by human modification of the landslide dam at Klickitat Lake around 1960, the largest peaks in mass accumulation rates in the mid-20th century at both lakes in the early 1950s precede major road construction and logging activity in the watersheds. Subsequent sedimentation rates are lower, but variable, and possible effects of logging and road development might be exacerbated by abnormal precipitation and heavy snow events. A comparison of previous studies of landslide-dammed lakes in larger watershed of the OCR are consistent with our findings of increased sedimentation in the mid-20th century, as well as higher sedimentation rates in the debris-flow dominated southern Tyee Formation than in the lower-relief northern Tyee Formation.

Presentations

• Halfpenny, A., Scrivner, C., & Wetherell, M. (2022).

  A Comparison of Quartz Source Determination Using Supervised Machine Learning verses a Traditional Ratio Approach

  . Microscopy and Microanalysis.

Creative Productions

• Wetherell, M. (2021. How Worm Holes Ended Wormworld. PBS Eons. YouTube Channel: PBS. https://www.youtube.com/watch?v=getaQoYBD28
  More info

  Elongated tubes, flat ribbons, and other “worm-like” body plans were so varied and abundant that a part of the Ediacaran is sometimes known as Wormworld. But in the end, the ancient Wormworld was ended by the actions of its very own worms.

Others

• Wetherell, M. (2024, February). Student Course Evaluation Scraper.
  More info

  This is a script that imports the poorly formatted student course evaluation data from last year. It then analyzes them for inequity and produces weighted scores to compensate for courses with low feedback rates.