Obsidian hydration dating arab dating site online to kuwait 2016
Obsidian–hydration–rind dating, method of age determination of obsidian (black volcanic glass) that makes use of the fact that obsidian freshly exposed to the atmosphere will take up water to form a hydrated surface layer with a density and refractive index different from that of the remainder of the obsidian.The thickness of the layer can be determined by microscopic examination of a thin section of the sample cut at right angles to the surface.Obsidian hydration dating of volcanic events had been compared with ages of the same events determined by the 14C and KAr methods at several localities.The localities, ranging in age from 1200 to over 1 million yr, include Newberry Craters, Oregon; Coso Hot Springs, California; Salton Sea, California; Yellowstone National Park, Wyoming; and Mineral Range, Utah. A number of factors including volcanic glass composition and exposuretemperature history must be known in order to relate hydration thickness to age.The effect of composition can be determined from chemical analysis or the refractive index of the glass. Exposure-temperature history requires a number of considerations enumerated in this paper.
Ceramic samples will be subjected to mineralogical analysis to determine whether or not they were made of local clays.
He works on his farthers farm and is also the president of a fraternity at Wichita State.
He is interested in Archaeological Dating because it allows archaelogists to understand how old certain artifacts are and Obsidian Hydration is an important part of doing that.
The rate of penetration of water is dependent upon several factors, primarily the chemical composition of the glass and the temperature at which the hydration occurred.
Discussions are given of techniques for measuring the hydration thickness, measurement (or estimates) of ambient hydration temperature, chemical composition of the obsidian, and the conversion of hydration thickness to dating the time of manufacture of the artifact.