Abstract ........................................................ 5
l. Introduction and general geology ............................. 9
2 Deglaciation of the aland sea area .......................... 11
3. Shapes and occurrences of erosion marks ..................... 13
4. Origin of the polished flutes ............................... 21
5. Summary and conclusions ..................................... 31
6. Acknowledgements ............................................ 34
7. References .................................................. 35
Table 1 ........................................................ 39
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