Σύγκριση μεθόδων

	Χρονολόγηση με Ενυδάτωση Οψιδιανού	Χρονολόγηση με Θερμοφωταύγεια
Πεδίο	Αρχαιολογία	Αρχαιολογία
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1960	1960s
Δημιουργός	Irving Friedman	Michael Aitken
Τύπος	Hydration layer dating technique	Luminescence dating technique
Θεμελιώδης πηγή	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.	Aitken, M. J. (1985). Thermoluminescence Dating. Academic Press.
Εναλλακτικές ονομασίες	OHD, obsidian hydration method	TL dating, thermoluminescence chronometry
Συναφείς	4	4
Σύνοψη	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.	Thermoluminescence (TL) dating is a chronometric technique that determines the age of pottery, ceramics, and sediments by measuring light emitted when heated to high temperatures. Pioneered by Michael Aitken in the 1960s, it quantifies the accumulated radiation dose stored in mineral crystal lattices. The method revolutionized archaeological dating by enabling scientists to date ceramic vessels and fired clay objects directly, providing absolute chronologies for human occupation sites worldwide.