Development of coarse-grained facies in lacustrine rift basins: Examples from East Africa

Research Article| February 01, 1990 Development of coarse-grained facies in lacustrine rift basins: Examples from East Africa Christopher A. Scholz; Christopher A. Scholz 1Department of Geology, Duke University, Durham, North Carolina 27706 Search for other works by this author on: GSW Google Scholar Bruce R. Rosendahl; Bruce R. Rosendahl 2Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149 Search for other works by this author on: GSW Google Scholar Deborah L. Scott Deborah L. Scott 3Department of Geology, Duke University, Durham, North Carolina 27706 Search for other works by this author on: GSW Google Scholar Author and Article Information Christopher A. Scholz 1Department of Geology, Duke University, Durham, North Carolina 27706 Bruce R. Rosendahl 2Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149 Deborah L. Scott 3Department of Geology, Duke University, Durham, North Carolina 27706 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (2): 140–144. https://doi.org/10.1130/0091-7613(1990)018<0140:DOCGFI>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 MailTo Tools Icon Tools Get Permissions Search Site Citation Christopher A. Scholz, Bruce R. Rosendahl, Deborah L. Scott; Development of coarse-grained facies in lacustrine rift basins: Examples from East Africa. Geology 1990;; 18 (2): 140–144. doi: https://doi.org/10.1130/0091-7613(1990)018<0140:DOCGFI>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 Detailed studies of high-resolution and multifold seismic reflection data from the two largest East African rift lakes, Malawi and Tanganyika, reveal a complex suite of coarse-grained depositional facies. These facies occur within specific regions of the controlling half grabens that compose the rift lakes. Sand-prone environments include subaqueous channels and small drowned fluvial complexes. Channel systems range from large erosional canyons to deep-water turbidite channel-levee systems. Lowstand and highstand deltas of axial and shoaling-side rivers are volumetrically important coarse-grained facies. Fan deltas develop along the base of major border faults during lake lowstands; subaqueous talus fan deposits occur along the base of the border faults during lake highstands. Lowstand deltas are the best-preserved progradational facies in these rift lakes. In addition to simple tectonic control, drastic tectonically or climatically induced lake-level change significantly regulates the production of coarse-grained lacustrine synrift deposits. 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.