Geoscience Reference
In-Depth Information
Fig. 5.10
Thickness (in m) of A zone sediments (Baltic Ice Lake to Ancylus Lake) and B zone
sediments (Littorina to LIA)
through the Stolpe Channel. This is due to the opening of the entrance to the Baltic
dynamics. As a result the SW-NE trending sediment body of the Stolpe Foredelta
5.5.4 Downhole Facies Variation at the Central Eastern Gotland
Basin as Indicator for Holocene Environmental Change
abundance of lamination in central Eastern Gotland Basin cores can be used to
reconstruct the oxygen supply to the bottom water during deposition. Changes in
lamination are reflected well in the acoustic MSCL p-wave velocity. An acoustic
index as detrended (0, 1) standardized p-wave velocity turned out to show values
close to 1.0 in laminated sediments, reflecting anoxic environment of deposition,
whereas homogeneous sediments deposited under oxic conditions of bottom water
index can be used as a qualitative proxy variable indicating the ventilation of near-
bottom water during sediment deposition. Looking at the p-wave velocity curve