Lidar-Based Detection and Interpretation of Glaciotectonic Features of the Morainic Topography of Finland

Figure 7

An ice-marginal possible hill-hole pair on II Salpausselkä line (N-S course), south of Joensuu in North Karelia. Along the general map of surface geology (Geological Survey), the material of the hill and surroundings consist mostly of glaciofluvial drift, but the bottom of the hole is morainic. The imagined displacement direction is the same (300°) as the direction of small drumlins, which presumably show last prominent ice flow direction at the place. The height difference of the uniform contour lines of the base map is 5 m. So that hole is about 25 m deep. (Map sheets N5431H, N5432G, © National Land Survey).