This paper uses new lithic research with well-dated stratified collections from the foothills of the Absaroka Mountains and adjacent Bighorn Basin to build a dichotomous key for chronologically classifying points in the northern Greater Yellowstone Ecosystem (GYE) as Late Prehistoric (200–1,500 cal BP), Late Archaic (1,500–3,200 cal BP), Middle Archaic (3,200–5,700 cal BP), Early Archaic (5,700–8,500 cal BP) or Paleoindian (8,500–12,000 cal BP). The Plains Typology, which is currently used throughout the GYE, has never been formally based on points with affiliated absolute dates. Further, it has always been unclear how well this typology functions in the mountains of the GYE. Based on detailed attributes from over 600 points, including Mummy Cave (48PA201), a foundational chronology for the region, we build a key intended for use with fragmentary surface collections. We then use this key to consider variation in high elevation projectile points from the Beartooth and Absaroka Mountains.

中文翻译：

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细化表面收藏的年表：平原类型学和大黄石生态系统的形态二分键的新改编

本文使用新的岩屑研究和来自阿布萨罗卡山脉山麓和邻近的比格霍恩盆地的年代久远的分层收集物，构建了一个二分法关键，用于将大黄石生态系统 (GYE) 北部的点按年代分类为史前晚期（200-1,500 cal BP )、晚古风 (1,500-3,200 cal BP)、中古风 (3,200-5,700 cal BP)、早古风 (5,700-8,500 cal BP) 或古印度 (8,500-12,000 cal BP)。目前在整个 GYE 中使用的平原类型学从未正式基于具有附属绝对日期的点。此外，一直不清楚这种类型学在 GYE 山脉中的作用如何。基于来自 600 多个点的详细属性，包括该地区的基本年表木乃伊洞穴 (48PA201)，我们构建了一个用于碎片表面集合的密钥。然后我们使用这个键来考虑来自 Beartooth 和 Absaroka 山脉的高海拔弹丸点的变化。