ABSTRACT

The glacial geomorphology between the lakes Vänern and Vättern is presented on a 1:220,000 scale, LiDAR-based map covering approximately 18,000 km². Fifteen landform units have been mapped; end moraines, De Geer moraines, drumlins, crag-and-tails, hummock tracts and corridors, irregular ridges, murtoos, eskers, deltas/sandur, outwash complexes, meltwater channels, boulder bars/sheets, the Timmersdala ridge, raised shorelines, sand dunes and prominent landslide scars (the last three are post-glacial). The area includes moraines associated with the Younger Dryas cold interval and drainage deposits of the Baltic Ice Lake. Additionally, the map reveals previously undetected geomorphic features including (1) murtoos, (2) abundant traces of meltwater erosion manifested as channels and hummock corridors, (3) laterally extensive end-moraine systems (the Remmene and Kungslena ice-margin positions) and (4) the distinct lobate shape of end moraines formed above the highest shoreline. This map provides a uniform base for future use in georesources, paleo ice-sheet modelling, geologic history, and geoconservation.

摘要

Vänern和Vättern湖之间的冰川地貌以1：220,000的比例尺绘制，基于LiDAR的地图覆盖了大约18,000 km ²。已经绘制了15个地形单位；终rain，De Geer rain，鼓林，尾巴，山岗道和走廊，不规则的山脊，murtoos，eskers，三角洲/桑杜尔河，冲积层，融水通道，巨石条/床单，蒂默斯达拉山脊，凸起的海岸线，沙子沙丘和明显的山体滑坡疤痕（后三个是冰川后）。该地区包括与Younger Dryas寒冷间隔和波罗的海冰湖的排水沉积物相关的葡萄树。此外，该地图还揭示了以前未发现的地貌特征，包括（1）murtoos，（2）大量融化的水蚀痕迹表现为通道和吊床走廊，（3）横向广泛的冰mor系统（Remmene和Kungslena冰缘位置）和（4）在最高海岸线上方形成的端粒独特的叶状形状。