Marine bio-erosion cavities in metamorphic limestone, weathering rates, and the post glacial land rise in Salten, North Norway.
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Marine mollusk activity initiate erosion cavities in marble and dolomite in the Saltsraumen littoral zone. Such cavities are gradually exposed above sea water by the still on-going eustatic rebound since the last Ice age. The diameter of cavities observed above the high tide zone plotted against altitude show a steady increase in size over time due to weathering processes. Weathering rates as a function of land rise are calculated and discussed. The observed growth rates are correlated with chronology of sea level changes in the same period based on alternative data.