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For information on dating obsidian , see the article on obsidian hydration. Obsidian-hydration dating: Its past, present, and future application in Mesoamerica. Kuzmin YV, Speakman RJ, Glascock MD, Popov VK, Grebennikov AV, Dikova MA, and Ptashinsky AV. Obsidian use at the Ushki Lake complex, Kamchatka Peninsula (Northeastern Siberia): implications for terminal Pleistocene and early Holocene human migrations in Beringia.
See the History of Glass Making, if that's what interests you.
This is probably a mold code, although the meaning is currently unknown.
May 28, at singlepartys heidelberg Since there is NO dot, presumably this is from ? It is in a plastic container that also says iw Harper on it.
June 25, at 9: Both archaeologists and collectors, have been perplexed that the single- digit date codes could reflect either the s or s.
The bottom of the base has a large below the other numbers. Hi David…I have found a 32 oz clear glass bottle with Art Deco designs on the top, bottom and sides of both sides.
For more rock science on the substance, see the geology entry for obsidian.
The 7 to the right of the Owens-Illinois mark is a date code for owens-illinois glass company dating final year the plant was openso the mold had laid in storage at least seven years prior to its reuse.
Scholars identify the chemical fingerprint of each deposit through such methods as X-ray fluorescence or neutron activation analysis and then compare that to what is found in an obsidian artifact.
Alca is a type of obsidian that is solid and banded black, gray, maroon brown and bottled black maroon brown, that is found in volcanic deposits in the Andes mountains between 3700-5165 meters (12,140-16,945 feet) above sea level.
seems to have realized that a zero could indicate either or , so a new code needed to be.