Because dating of geological materials is pivotal to understanding the timing, rate, and regional extent of past changes and events, I have a strong interested in geochronology. Assessing the true uncertainties of age models is a major challenge.
I have developed a rating scheme that explicitly recognizes the key factors that influence the geochronological accuracy of sedimentary sequences that do not lend themselves to conventional statistical approaches, and assigns reasonable numerical ratings based on a simple, reproducible, and customizable procedure. "ChronRater" is described in this excerpt and this poster. I welcome your feedback on this approach.
My methodological specialties are:
- Amino acid geochronology:
- I direct the Amino Acid Geochronology Laboratory
- I am a founding co-Editor of the journal, Quaternary Geochronology - - I co-edited a special issue on amino acid racemization
- I helped develop that Amino Acid Racemization database at NOAA Paleoclimatology
- And tephrochronology in southern Alaska where my group has:
- used tephras across multiple lake sequences to assess accuracy of 14C-based age models
- found evidence for many more eruptions of Redoubt Volcano than recognized previously
- improved the Holocene tephra-fall record of the Cook Inlet and Adak regions
- discovered and dated Pleistocene terpha beds in the Bristol Bay region
