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

Journal Article · Wed Jun 01 00:00:00 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), Vol. 16:6
• Country of Publication: United States
• Language: English

Related Subjects

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