Enigmatic rock structures in the form of walls, chambers, tunnels, and cairns are common archaeological features in northeastern United States, but the age of their construction is mostly unknown. Debate persists as to whether they are colonial or pre-colonial in age. Luminescence dating was applied at several sites to sediments underneath the rocks or to the rocks themselves. Sediment ages obtained from potassium feldspars using IRSL place their construction in the late 16th century, just before sustained colonial settlement. Sediment ages obtained from quartz using OSL place their construction later, but the much weaker quartz signals have issues, primarily the prevalence of a slower bleaching component. These raise questions on the credibility of the quartz ages. The age from one rock, also using IRSL, supports the K-feldspar sediment ages. The evidence suggests a pre-colonial construction, by ancestors of modern native Americans.

墙壁、房间、隧道和石碑形式的神秘岩石结构是美国东北部常见的考古特征，但其建造年代大多未知。关于它们是殖民时代还是前殖民时代的争论一直存在。发光测年在几个地点被应用于岩石下方的沉积物或岩石本身。使用 IRSL 从钾长石中获得的沉积物年龄将其建造于 16 世纪后期，就在持续的殖民定居之前。使用 OSL 从石英中获得的沉积物年龄将它们的构造置于较晚，但较弱的石英信号存在问题，主要是较慢的漂白成分的普遍存在。这些对石英时代的可信度提出了质疑。一块岩石的年龄，也使用 IRSL，支持钾长石沉积物年龄。