Obsidian hydration dating lab dating someone 16 years younger
Residual values from our regression suggest that hydration age estimates are usually within 15% of the radiocarbon estimates. If your browser does not accept cookies, you cannot view this site.To measure the hydration band, a small slice of material is typically cut from an artifact.This sample is ground down to about 30 micrometers thick and mounted on a petrographic slide.While there have been many studies that have questioned the veracity of obsidian hydration dating, the chronological technique had yet to be tested in southern Peru.Along with Jelmer Eerkens (the lead author in the study), Vaughn and several other colleagues (Tim Carpenter, Christina Conlee, Kathy Schreiber, Moises Linares Grados) compared over 230 obsidian hydration readings from 30 individual site components from the Southern Nasca Region (SNR). NOTE: if you are a prospective graduate student and interested in working with Dr.Allowing a website to create a cookie does not give that or any other site access to the rest of your computer, and only the site that created the cookie can read it.Obsidian hydration dating (OHD) is a geochemical method of determining age in either absolute or relative terms of an artifact made of obsidian.
Obsidian obeys the property of mineral hydration, and absorbs water, when exposed to air, at well defined rate.
These site components included sites investigated during Proyecto Marcaya directed by Vaughn, Proyecto Nasca Temprano (ENCE) co-directed by Vaughn and Linares , Proyecto Nasca Sur directed by Schreiber, and Proyecto La Tiza and Proyecto Pajonal Alto directed by Conlee. Vaughn, it is imperative that you contact him as early in the application process as possible.
We were able to make independent age estimates of each hydration reading based on radiocarbon dates and temporally diagnostic artifacts.
Although there were some problems with small sample sizes, readings needed to be adjusted for elevation, and the readings are source specific, a very strong relationship accounting for nearly 90% of the total variation in the data set was found.
This suggests that obsidian hydration dating (OHD) works very well in the SNR and is a viable means of independently estimating age.