Originally published as: Kristen, I., Fuhrmann, A., Thorpe, J., Röhl, U., Wilkes, H., Oberhänsli, H. (2007): Hydrological changes in southern Africa over the last 200 Ka as recorded in lake sediments from the Tswaing impact crater. - South African Journal of Geology, 110, 2-3, 311-326, DOI: 10.2113/gssajg.110.2-3.311. Hydrological changes in southern Africa over the last 200 kyr as recorded in lake sediments from the Tswaing impact crater I. Kristen GeoForschungsZentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany,
[email protected] A. Fuhrmann GeoForschungsZentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany Present address: Saudi Aramco, Dhahran 31311, Saudi Arabia,
[email protected] J. Thorpe formerly at Department of Geography, University College London, 26 Bedford Way, London WC1H 0AP, Great Britain,
[email protected] U. Röhl Center for Marine Environmental Sciences (MARUM), Universität Bremen, Leobener Strasse, 28359 Bremen, Germany,
[email protected] H. Wilkes GeoForschungsZentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany,
[email protected] and H. Oberhänsli GeoForschungsZentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany,
[email protected] Short working title: Hydrological changes recorded in sediments from Lake Tswaing (South Africa) Abstract Sediments from Lake Tswaing (25°24’30’’ S, 28°04’59’’ E) document hydrological changes in southern Africa over the last 200 kyr. Using high-resolution XRF- scanning, basic geochemistry (TIC, TOC, TN), organic petrology and Rock-Eval pyrolysis, we identify intervals of decreased carbonate precipitation, increased detrital input, decreased salinity and decreased autochthonous (algal and bacterial) organic matter content that represent periods of less stable water column stratification and increased rainfall.