ABSTRACT In this article, we report an obsidian hydration dating (OHD) analysis of 32 obsidian artifacts from the Witt Archaeological Locality in Tulare County, California. The artifacts (Western stemmed points, concave base points, crescents) were recovered from agricultural contexts, where provenience is indeterminate. Effective hydration temperature (EHT) was computed from local meteorological records. Hydration rates were based on geochemical source and adjusted for EHT, and ages computed based on the square–root–of–time model. Of the mean OHD ages, 80% are in the 7,000–9,000 cal BP range. The probability that the actual ages could be Clovis or earlier (>∼13,200 years) was computed based on the mean and standard deviation of the OHD ages.

中文翻译：

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来自加利福尼亚州图莱里湖的拟议古印度文物的黑曜石水合测年

摘要 在本文中，我们报告了对来自加利福尼亚州图莱里县威特考古区的 32 件黑曜石文物的黑曜石水合测年 (OHD) 分析。这些人工制品（西方干点、凹基点、新月）是从农业环境中恢复的，在那里出处是不确定的。有效水合温度 (EHT) 是根据当地气象记录计算的。水合率基于地球化学来源并根据 EHT 进行调整，年龄根据时间平方根模型计算。在平均 OHD 年龄中，80% 在 7,000-9,000 cal BP 范围内。实际年龄可能是克洛维斯或更早（>~13,200 年）的概率是根据 OHD 年龄的平均值和标准差计算的。