Correlated oceanic and continental records demonstrate past climate and hydrology of North Africa (0-140 ka)

Journal Article · Mon Apr 01 00:00:00 EST 1991 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1991)019<0307:COACRD>2.3.CO;2· OSTI ID:5611239

Lezine, A M ^[1]; Casanova, J ^[2]

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1. Centre National de la Recherche Scientifique, Marseille (France)
2. Universite du Quebec a Montreal, Quebec (Canada)

Analysis of pollen and dinocysts in a core from the eastern Atlantic (core V22-196; lat 13{degree}50'N, long 18{degree}57'W) provides the first continuous record of paleoclimate and paleohydrology for the latest climatic cycle. During interglacial intervals, increases in pollen input from humid vegetation zones are correlative with high dinocyst productivity. This data shows a close coincidence of northward extensions of Sudanian and Guinean vegetation zones in North Africa and increases in fresh-water input into the Atlantic. Direct evidence indicates positive hydroclimatic phases at 135, 125, 103, 80, 47, and 12-10 ka, coincident with widespread continental records of high lake levels, that confirm the validity of the U/Th chronology.

• OSTI ID: 5611239
• Journal Information: Geology; (USA), Vol. 19:4; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
AFRICA
GEOLOGIC FORMATIONS
HYDROLOGY
PALEOCLIMATOLOGY
AGE ESTIMATION
ATLANTIC OCEAN
CLIMATES
COMPARATIVE EVALUATIONS
CONTINENTAL CRUST
CORRELATIONS
GLACIERS
ISOTOPE DATING
OCEANIC CRUST
PALEONTOLOGY
PLANTS
POLLEN
THORIUM ISOTOPES
URANIUM ISOTOPES
VARIATIONS
ACTINIDE ISOTOPES
EARTH CRUST
GAMETES
GERM CELLS
ISOTOPES
SEAS
SURFACE WATERS
580000* - Geosciences