เปรียบเทียบวิธี

	การหาอายุด้วยการดูดซึมน้ำของออบซิเดียน	การหาอายุด้วยการเรืองแสงที่กระตุ้นด้วยแสง
สาขาวิชา	โบราณคดี	โบราณคดี
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1960	1985
ผู้ริเริ่ม	Irving Friedman	David Huntley
ประเภท	Hydration layer dating technique	Luminescence dating technique
แหล่งต้นตำรับ	Friedman, I., & Smith, R. L. (1960). A new dating method using obsidian: Part 1, the surface rind method. Journal of Geophysical Research, 65(4), 1287-1291.	Huntley, D. J., Godfrey-Smith, D. I., & Thewalt, M. L. (1985). Thermoluminescence dating of ocean sediments. Canadian Journal of Earth Sciences, 22(3), 423-427.
ชื่อเรียกอื่น	OHD, obsidian hydration method	OSL dating, optical dating
ที่เกี่ยวข้อง	4	4
สรุป	Obsidian hydration dating (OHD) is a chronometric method that determines the age of obsidian artifacts by measuring the thickness of a hydration layer formed on their exposed surfaces. Developed by Irving Friedman and Robert Smith in 1960, it is based on the principle that fresh obsidian surfaces absorb water from the surrounding environment at a measurable rate. The method is particularly valuable in archaeology for dating volcanic glass tools and other obsidian objects, especially in regions where obsidian was commonly used for cutting and scraping implements.	Optically stimulated luminescence (OSL) dating is a chronometric method that determines the age of sedimentary materials by measuring light-induced electron release from mineral grains. Developed by David Huntley and colleagues in the 1980s, it measures the time elapsed since sediment was last exposed to sunlight. This technique is widely used in archaeology, geology, and paleoenvironmental studies to date deposits ranging from a few decades to several hundred thousand years old.