Litho- and chronostratigraphy of the Early Weichselian time period, or Marine Isotope Stages (MIS) 5e-5a, is insufficiently established in Northern Fennoscandia and still more ambiguous is the regional-scale distribution of the corresponding end moraines. We applied Light Detection And Ranging Digital Elevation Models (LiDAR DEMs), electromagnetic (EM) sedimentary anisotropy (orientation) and ground penetrating radar (GPR) to reveal till-covered landforms diagnostic to the Early Weichselian phase(s) in Finnish Lapland. Morphometric and geophysical data revealed that sands and gravels of the Porttipahta end moraine were deposited from the north-northwest and are overlain by one diamicton (till) unit deposited from the southwest and most likely being correlative to the Late Weichselian (MIS 2). Sub-till OSL-ages yielded 91 ± 19, 96 ± 14, 100 ± 16 and 120 ± 26 ka, thus correlative with the MIS 5c interstadial (Brørup). The Porttipahta end moraine deposited during the deglaciation of the Early Weichselian 5d stadial (Herning).

The NW-SE oriented till-covered eskers and rock drumlins in the area suggest Late Saalian (MIS 6) phase. Southwest of the Porttipahta area the end moraine complex is deformed by earthquake(s) attributable to glacial isostatic adjustment (GIA) probably during the MIS 5d phase. The morphological appearance is similar to Veiki moraine in Norrbotten, Sweden, and high-resolution LiDAR DEMs emphasize that both landforms exhibit a minute erosion by the later stadials. It remains unresolved, if the Porttipahta end moraine represents the maximum extent of the MIS 5d or if it represents a recessional stage.

早期Weichselian 时期的岩石和年代地层学，或海洋同位素阶段(MIS) 5e-5a，在Fennoscandia 北部没有得到充分建立，而且相应端冰碛的区域尺度分布更加模糊。我们应用光探测和测距数字高程模型 (LiDAR DEM)、电磁 (EM) 沉积各向异性（方向）和探地雷达 (GPR) 来揭示芬兰拉普兰早期魏氏阶段的耕作覆盖地貌诊断信息。形态测量和地球物理数据表明，Porttipahta 端碛的砂砾石沉积自西北偏北，上面覆盖着一个从西南沉积的 diamiton (till) 单元，很可能与晚 Weichselian (MIS 2) 相关。分至 OSL 年龄产生 91 ± 19, 96 ± 14, 100 ± 16 和 120 ± 26 ka，因此与 MIS 5c 间质 (Brørup) 相关。Porttipahta 端碛沉积于早期魏克塞尔期 5d stadial (Herning) 冰川消退期间。

该地区面向 NW-SE 的耕作覆盖的 eskers 和摇滚鼓手表明晚萨利 (MIS 6) 阶段。在 Porttipahta 地区西南部，可能在 MIS 5d 阶段，由于冰川均衡调整 (GIA) 导致的地震使端碛复合体变形。形态外观与瑞典北博滕的 Veiki 冰碛相似，高分辨率 LiDAR DEM 强调这两种地貌都表现出受到后期 stadials 的微小侵蚀。如果 Porttipahta 端碛代表 MIS 5d 的最大范围，或者它代表衰退阶段，则仍未解决。