@article {, title = {Where in the World does Obsidian Hydration Dating Work?}, journal = {American Antiquity}, volume = {61}, number = {1}, year = {1996}, note = {Obsidian hydration works better close to the equator because it provides a stable hydration environment due to a small temperature amplitude wave during the day. Also, a thermal cell used during excavation can help to calibrate temperatures.}, pages = {136-148}, author = {Ridings, Rosanna} }