Luminescence dating laboratory
There is now convincing evidence that many glacial, fluvial, aeolian, and even shallow marine sediments can be dated by OSL techniques.
TALKS - Kirk Townsend* and Tammy Rittenour, Episodic arroyo entrenchment and aggradation in Kanab Creek, Southern Utah Tammy Rittenour* et al., Single-grain OSL chronology of ice retreat and stages of Glacial Lake Benson, west-central Minnesota, USA Kerry Riley* and Tammy Rittenour, Mid-late Holocene arroyo cut-fill dynamics: Hydro-climate and complex inter-basin response POSTERS - 214-3: Kerry Riley* and Tammy Rittenour, Erosion rates influence arroyo cut-fill dynamics in semi-arid catchments draining the Grand Staircase region of Colorado Plateau 312-3 : Michelle Nelson* and Tammy Rittenour, Best practices for collection of luminescence samples and estimating water content for dose-rate determination: Why sample selection, collection technique and water content matters 312-6: Tammy Rittenour* et al., How old are the SP and Strawberry volcanic vents and flows in the San Francisco Volcanic Field, Arizona?As the OSL of a sediment is quickly lost when exposed to sunlight (tens of seconds) many sediments are bleached (lack an OSL signal) when deposited and buried.After deposition these sediments accumulate luminescence which can be measured allowing the age of burial to be determined.These samples are then dated, and the age information is used to help understand the nature of long term environmental change. The laboratory welcomes visiting colleagues from other universities, and, from time to time, undertakes limited contract work. We can also arrange training for undergraduate and graduate students, post-docs, and visiting researchers.
Please see the links at left for more information about luminescence and the DRILL.
Click on 'Summer short course' in the menu to the left for more information.
Tammy Rittenour and Kerry Riley organized a successful 2016 Rocky Mountain Friends of the Pleistocene field trip to southern Utah in mid-October.
For sediments some new problems were encountered, with some grains perhaps not being completely bleached at deposition.
For OSL signals there is no simple procedure for the selection of a thermally stable signal, as there had been in the case of pottery.
Chronologies have been developed for archaeological sites in Botswana and the U. The laboratory has mainly RISØ equipment and OSL ages are obtained using the reliable single-aliquot, regenerative-dose (SAR) protocol.