Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Seismic records of late Pleistocene aridity in Lake Tanganyika, tropical East Africa
Journal of Paleolimnology, Volume 40, No. 2, Year 2008
Notification
URL copied to clipboard!
Description
New intermediate-resolution, normal-incidence seismic reflection profiles from Lake Tanganyika's central basin capture dramatic evidence of base-level change during two intervals of the late Pleistocene. Four seismically-defined stratigraphic sequences (A-D) tied to radiocarbon-dated sediment cores provide a chronology for fluctuating environmental conditions along the Kalya Platform. Stacked, oblique clinoforms in Sequence C are interpreted as prograding siliciclastic deltas deposited during a major regression that shifted the paleo-lake shore ∼21 km towards the west prior to ∼106 ka. The topset-to-foreset transitions in these deltas suggest lake level was reduced by ∼435 m during the period of deposition. Mounded reflections in the overlying sequence are interpreted as the backstepping remnants of the delta system, deposited during the termination of the lowstand and the onset of transgressive conditions in the basin. The youngest depositional sequence reflects the onset of profundal sedimentation during the lake level highstand. High amplitude reflections and deeply incised channels suggest a short-lived desiccation event that reduced lake level by ∼260 m, interpreted as a product of Last Glacial Maximum (32-14 ka) aridity. Paleobathymetric maps constructed for the two interpreted regressions reveal that despite the positive lake-floor topography created by the Kavala Island Ridge Accommodation Zone, Lake Tanganyika remained a large, mostly connected water body throughout the late Pleistocene. The results of this analysis further imply that Lake Tanganyika is the most drought resistant water body in the East African tropics, and may have acted as a refuge for local and migrating fauna during periods of prolonged aridity. © 2007 Springer Science+Business Media B.V.
Authors & Co-Authors
McGlue, Michael Matthew
United States, Tucson
The University of Arizona
Lezzar, Kiram Eddine
United States, Tucson
The University of Arizona
Cohen, Andrew S.
United States, Tucson
The University of Arizona
Russell, James M.
United States, Providence
Brown University
Tiercelin, Jean Jacques
France, Rennes
Géosciences Rennes
Felton, Anna A.
United States, Tucson
The University of Arizona
Mbede, Evelyne I.
Tanzania, Dar es Salaam
University of Dar es Salaam
Nkotagu, Hudson H.
Tanzania, Dar es Salaam
University of Dar es Salaam
Statistics
Citations: 84
Authors: 8
Affiliations: 4
Identifiers
Doi:
10.1007/s10933-007-9187-x
ISSN:
09212728
Research Areas
Environmental
Study Design
Cohort Study
Study Locations
Multi-countries