Pre-Late Weichselian glaciotectonized sediments in the Sjötorp area, Västergötland, Sweden

Abstract

Glaciotectonized clay occurs above the marine limit in the Sjötorp area, c. 22 km WNW of Falköping in the province of Västergötland, Sweden. Two directions of glaciotectonics have been determined, first from the W-WNW, followed by a less intense deformation from the NNE. Striae also occur in these two directions. The direction of glaciotectonics from the W-WNW suggests that it occurred prior to the Late Weichselian deglaciation. The micropalaeontological investigation reveals that the pollen flora are not of Weichselian or Holocene age. The micropalaeontological result supports the interpretation, mainly based on the direction of glaciotectonic deformation, that the clay was orginally deposited prior to the latest Weichselian glaciation of the area.

Key Words:

• Glaciotectonics
• glaciation
• Västergötland
• Sweden
• Sjötorp
• Weichselian