High-resolution record of cyclic climatic change during the past 4 ka from Lake Turkana, Kenya

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Geology; (United States)

DOI:https://doi.org/10.1130/0091-7613(1988)016<0496:HRROCC>2.3.CO;2· OSTI ID:6935778

Halfman, J D; Johnson, T C

Profiles of carbonate content and lamination thickness in an 11.3 m core from Lake Turkana are interpreted as a record of climatic change for the past 4 ka. On a time scale of millennia, the data agree with other paleohydrologic records from sub-Saharan east Africa. Time-series analysis of both data sets reveal periods of about 270, 200, 165, and 100 yr. The thickness data suggest additional periods of about 78, 44, 31, 25, and possibly 20 yr. The sediments consist of laminated light and dark couplets, which are interpreted as a response to an average 4-yr variability in the hydrology of the Ethiopian Plateau. The authors suggest that this may be a feedback from the El Nino-Southern Oscillation.

• Research Organization: Duke Univ. Marine Lab., Beaufort, NC (USA)
• OSTI ID: 6935778
• Journal Information: Geology; (United States), Journal Name: Geology; (United States) Vol. 16:6; ISSN GLGYB
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580100* -- Geology &amp; Hydrology-- (-1989)
AFRICA
CARBONATE ROCKS
DEVELOPING COUNTRIES
DIMENSIONS
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
HYDROLOGY
KENYA
LAKES
LAYERS
PALEOCLIMATOLOGY
PALEONTOLOGY
RIFT ZONES
ROCKS
SEDIMENTARY ROCKS
SEDIMENTS
SURFACE WATERS
THICKNESS
VARIATIONS