Magnetostratigraphy in the vicinity of the cretaceous-tertiary boundary in Limhamn,southern Sweden |
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| Authors: | Bo A Sjöberg |
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| Institution: | (1) The Stockholm Paleomagnetic Laboratory, Dept. of Geology and Geochemistry, University of Stockholm, 106 91 Stockholm, Sweden |
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| Abstract: | Summary A magnetostratigraphic subdivision of the Danian and Upper Maastrichtian at Limhamn, souternmost Sweden, based upon 63 samples
from drill cores (only up and down is known), is proposed. The boundary between the Maastrichtian and the Danian — situated
in chron 29R — was determined by means of nanofossils. It is marked by a hardground surface indicating a hiatus with an estimated
duration of 100 ka. The presence of chron 28R at the top of the Limhamn rock sequence and chron 30R in the Maastrichtian is
indicated by single samples with reversed polarity. Net sedimentation rates have been calculated on the basis of the proposed
magnetochronozones. the highest net sedimentation rate is found in the Danian part of chron 29R. |
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