SHED refers to Schmidt Hammer Exposure Dating: a technique that provides a cost-effective solution for dating the exposure of granite surfaces. This can be used to constrain the timing of past events, which permits a better understanding of the links between climate and landscape evolution.
The approach is based upon a study by Tomkins et al. (2016), in which a statistically significant relationship was observed between the exposure ages (derived from terrestrial cosmogenic nuclide dating), and Schmidt Hammer rebound values (R-values) of 25 granitic surfaces from NW England and Scotland.
By exploiting this relationship, researchers can quickly, cheaply and easily date granite exposure using a schmidt hammer and the shed.earth web tool.
Learn more at shed.earth and in the following academic articles:
- Tomkins, M. D., Dortch, J. M., & Hughes, P. D. (2016). Schmidt Hammer exposure dating (SHED): Establishment and implications for the retreat of the last British Ice Sheet. Quaternary Geochronology, 33, 46–60.
- Tomkins, M. D., Huck, J. J., Dortch, J. M., Hughes, P. D., Kirbride, M. P., & Barr, I. D. (2018). Schmidt Hammer exposure dating (SHED): Calibration procedures, new exposure age data and an online calculator. Quaternary Geochronology, 44, 55-62.
- Tomkins, M.D., Dortch, J.M., Hughes, P.D., Huck, J.J., Stimson, A.G., Delmas, M., Calvet, M., & Pallàs, R. (2018). Rapid age assessment of glacial landforms in the Pyrenees using Schmidt Hammer exposure dating (SHED), Quaternary Research 1-12.
- Tomkins, M., Dortch, J. Hughes, P., Huck, J.J. (2018). New evidence for widespread deglaciation of Scotland during the early Younger Dryas. Quaternary Science Reviews.