Dating agricultural artefacts such as field walls and clearance cairns using radiocarbon can be challenging, especially since the association with datable material may be poor. Rock surface burial dating using luminescence offers an alternative. Here we report on the luminescence dating of a medieval circular stone-walled enclosure at Sønnebøe, northern Scania, Sweden, using both buried rocks and sediments. Luminescence burial profiles from IRSL signals measured at 50 °C (IR₅₀) indicated significant prior light exposure in 7 of the 8 samples tested (5 granite, 2 felsic gneiss), in some cases multiple exposure burial cycles were indicated. These rock surfaces had apparently been exposed for sufficient time to allow accurate IRSL ages for the most recent burial event. In contrasts, no useful post-IR IRSL profiles were obtained indicating that this signal was not sufficiently reset to allow accurate determination of the burial dose on any of these rocks. IR₅₀ fading corrections (typically ∼50%) were derived by comparing field saturation with that induced in the laboratory. Quartz extracted from sediments surrounding the rocks gave an average measured to given dose ratio of 1.03 ± 0.01 (n = 90), and these sediment samples were then dated using multigrain aliquots; the corresponding feldspar dose recovery ratio obtained using rock samples was 0.98 ± 0.05 (n = 28). A total of 15 ages were derived; 8 quartz OSL ages from the disturbed coarse grained sediments surrounding the structure, and 7 fading corrected IR₅₀ ages from the surfaces of rocks (2–3 mm chips, ∼1 mm thick) used in the construction of the structure itself. The exposure events preserved by the ring enclosure stones unequivocally show wall building taking place at the site between 800 and 300 years ago.

使用放射性碳对农业文物（如田间墙和空地石碑）进行约会可能具有挑战性，特别是因为与可数据材料的关联可能很差。使用发光的岩石表面埋葬年代提供了另一种选择。在这里，我们使用埋藏的岩石和沉积物报告了瑞典斯堪尼亚北部 Sønnebøe 的中世纪圆形石墙围墙的发光年代测定。在 50 °C (IR ₅₀) 表明在测试的 8 个样品中的 7 个（5 个花岗岩，2 个长英质片麻岩）中有显着的先前曝光，在某些情况下，表明了多次曝光埋葬循环。这些岩石表面显然已经暴露了足够的时间，以便为最近的埋葬事件提供准确的 IRSL 年龄。相比之下，没有获得有用的红外后 IRSL 剖面，表明该信号没有充分重置，无法准确确定任何这些岩石上的埋藏剂量。红外₅₀通过将场饱和与实验室中诱导的场饱和进行比较，得出衰减校正（通常为~50%）。从岩石周围的沉积物中提取的石英的平均测量值与给定剂量比为 1.03 ± 0.01（n = 90），然后使用多粒等分试样对这些沉积物样品进行测定；使用岩石样品获得的相应长石剂量回收率为 0.98 ± 0.05 (n = 28)。共推导出15个年龄；8 个石英 OSL 年龄来自结构周围受干扰的粗粒沉积物，7 个衰落校正的 IR ₅₀年龄来自结构本身建造中使用的岩石（2-3 毫米碎屑，约 1 毫米厚）表面。由环围石保存的暴露事件明确表明，该遗址发生在 800 至 300 年前的墙壁建筑。