Estimating the age of formation of lakes: An example from Lake Tanganyika, East African Rift system

Research Article| June 01, 1993 Estimating the age of formation of lakes: An example from Lake Tanganyika, East African Rift system Andrew S. Cohen; Andrew S. Cohen 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Search for other works by this author on: GSW Google Scholar Michael J. Soreghan; Michael J. Soreghan 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Search for other works by this author on: GSW Google Scholar Christopher A. Scholz Christopher A. Scholz 2Duke University Marine Laboratory, Beaufort, North Carolina 28516 Search for other works by this author on: GSW Google Scholar Author and Article Information Andrew S. Cohen 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Michael J. Soreghan 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Christopher A. Scholz 2Duke University Marine Laboratory, Beaufort, North Carolina 28516 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (6): 511–514. https://doi.org/10.1130/0091-7613(1993)021<0511:ETAOFO>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Andrew S. Cohen, Michael J. Soreghan, Christopher A. Scholz; Estimating the age of formation of lakes: An example from Lake Tanganyika, East African Rift system. Geology 1993;; 21 (6): 511–514. doi: https://doi.org/10.1130/0091-7613(1993)021<0511:ETAOFO>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Age estimates for ancient lakes are important for determining their histories and their rates off biotic and tectonic evolution. In the absence of dated core material from the lake's sedimentary basement, several techniques have been used to generate such age estimates. The most common off these, herein called the reflection seismic-radiocarbon method (RSRM), combines estimates off short-term sediment-accumulation rates derived from radiocarbon-dated cores and depth-to-basement estimates derived from reflection-seismic data at or near the same locality to estimate an age to basement. Age estimates from the RSRM suggest that the structural basins of central Lake Tanganyika began to form between 9 and 12 Ma. Estimates for the northern and southern basins are younger (7 to 8 Ma and 2 to 4 Ma, respectively). The diachroneity off estimates for different segments of the lake. is equivocal, and may be due to erosional loss off record in the northern and southern structural basins or to progressive opening of the rift. The RSRM age estimates for Lake Tanganyika are considerably younger than most prior estimates and clarify the extensional history of the western branch of the East African Rift system. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.