Minute disc beads from the prehistoric American Southwest often exhibit perforations finer than 0.75 mm in diameter. Early archaeologists postulated that these tiny perforations were created with organic drills made from bone splinters or cactus needles. This article presents an experimental case for flaked-stone minute microdrills, which are refined replicas of more robust documented jewelry microdrills. With experimental lithic minute microdrills, I create perforations that match the size and appearance of tiny perforations observed in archaeological minute beads.

中文翻译：

---

西南史前微型珠中的微小穿孔：锂微型微型钻的实验案例

史前美国西南部的微小盘状珠子通常会出现直径小于0.75毫米的穿孔。早期的考古学家推测，这些微小的穿孔是由用骨碎片或仙人掌针制成的有机钻头制成的。本文介绍了片状石微钻的实验案例，它们是更坚固的有记录的珠宝微钻的精制复制品。通过实验性的石刻微型钻，我创建了与在考古微小珠子中观察到的微小穿孔的大小和外观相匹配的穿孔。