Patterned-ground landforms represent the most common phenomenon of periglacial environment, and their large sorted forms belong to the few morphological indicators of past permafrost distribution. The relic forms of patterned ground are widespread on high-elevated surfaces in the central European uplands, providing the evidence of regional periglacial conditions in the last glacial period. However, the timing of these landforms, as well as their potential for paleoclimate reconstructions, has remained unexplored. In this paper, we present 10 Be exposure ages from the large sorted polygons sampled at four sites in the Sudetes Mountains, the highest part of the central European uplands. These results indicate that these landforms started to form at the end of Marine Isotope Stage 3, and the main phase of their formation occurred between 30 and 20 ka. This research confirms the hypothesis of sorted patterned-ground formation within the last (Weichselian) glacial stage (110.6 – 11.7 ka) and suggests that earlier-sorted features are not preserved in the Sudetes. The recognized period of enhanced periglacial activity coincides with a prominent cold interval identified earlier in both regional and northern-hemispheric proxy records. Central Europe, cosmogenic-nuclide dating, past permafrost, patterned ground, periglacial environment, Quaternary

中文翻译：

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10 Be 苏台德山脉排序多边形的暴露年龄

花纹地面地貌代表了冰缘环境最常见的现象，其大的分类形态属于过去多年冻土分布的少数形态指标。在欧洲中部高地的高海拔地区广泛分布着花纹地面的遗迹形式，为末次冰期的区域冰缘条件提供了证据。然而，这些地貌形成的时间以及它们在古气候重建方面的潜力仍未得到探索。在本文中，我们从在欧洲中部高地最高部分苏台德山脉的四个地点采样的大型排序多边形中展示了 10 个 Be 暴露年龄。这些结果表明，这些地貌在海洋同位素第 3 阶段末期开始形成，其形成的主要阶段发生在 30 至 20 ka 之间。这项研究证实了最后（Weichselian）冰川阶段（110.6 – 11.7 ka）内分选的图案地面形成的假设，并表明早先分选的特征在苏台德人中没有保留。公认的冰缘活动增强时期与早先在区域和北半球替代记录中确定的显着寒冷间隔相吻合。中欧，宇宙成因核素测年，过去的永久冻土层，带图案的地面，冰缘环境，第四纪 公认的冰缘活动增强时期与早先在区域和北半球替代记录中确定的显着寒冷间隔相吻合。中欧，宇宙成因核素测年，过去的永久冻土层，带图案的地面，冰缘环境，第四纪 公认的冰缘活动增强时期与早先在区域和北半球替代记录中确定的显着寒冷间隔相吻合。中欧，宇宙成因核素测年，过去的永久冻土层，带图案的地面，冰缘环境，第四纪