The nature of varved sedimentation in the Cariaco Basin, Venezuela, and its palaeoclimatic significance

K. A. Hughen, J. T. Overpeck, Larry C Peterson, R. F. Anderson

Research output: Chapter in Book/Report/Conference proceedingChapter

57 Citations (Scopus)

Abstract

A laminated sediment record of the last 12 600 radiocarbon years from the anoxic Cariaco Basin provides a rare opportunity to study interannual to millenial-scale climatic change in a marine setting. Sedimentological and radiometric analyses of laminae couplets in the basin sediments indicate that they are annually deposited varves. The varves consist of light and dark laminae which are deposited as the result of the Intertropical Convergence Zone's annual north-south migration over the tropical North Atlantic, and the impact of this migration on regional upwelling and rainfall patterns. Varve measurements developed using X-ray images and thin sections indicate that a continuous 14 000 calendar year long varve chronology may be generated. Palaeoclimatic inferences are described.

Original languageEnglish (US)
Title of host publicationPalaeoclimatology and palaeoceanography from laminated sediments
EditorsA.E.S. Kemp
PublisherGeological Society, London; Special Publication, 116
Pages171-183
Number of pages13
StatePublished - 1996
Externally publishedYes

Fingerprint

varve
sedimentation
basin
intertropical convergence zone
thin section
sediment
chronology
upwelling
rainfall
climate change

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Hughen, K. A., Overpeck, J. T., Peterson, L. C., & Anderson, R. F. (1996). The nature of varved sedimentation in the Cariaco Basin, Venezuela, and its palaeoclimatic significance. In A. E. S. Kemp (Ed.), Palaeoclimatology and palaeoceanography from laminated sediments (pp. 171-183). Geological Society, London; Special Publication, 116.

The nature of varved sedimentation in the Cariaco Basin, Venezuela, and its palaeoclimatic significance. / Hughen, K. A.; Overpeck, J. T.; Peterson, Larry C; Anderson, R. F.

Palaeoclimatology and palaeoceanography from laminated sediments. ed. / A.E.S. Kemp. Geological Society, London; Special Publication, 116, 1996. p. 171-183.

Research output: Chapter in Book/Report/Conference proceedingChapter

Hughen, KA, Overpeck, JT, Peterson, LC & Anderson, RF 1996, The nature of varved sedimentation in the Cariaco Basin, Venezuela, and its palaeoclimatic significance. in AES Kemp (ed.), Palaeoclimatology and palaeoceanography from laminated sediments. Geological Society, London; Special Publication, 116, pp. 171-183.
Hughen KA, Overpeck JT, Peterson LC, Anderson RF. The nature of varved sedimentation in the Cariaco Basin, Venezuela, and its palaeoclimatic significance. In Kemp AES, editor, Palaeoclimatology and palaeoceanography from laminated sediments. Geological Society, London; Special Publication, 116. 1996. p. 171-183
Hughen, K. A. ; Overpeck, J. T. ; Peterson, Larry C ; Anderson, R. F. / The nature of varved sedimentation in the Cariaco Basin, Venezuela, and its palaeoclimatic significance. Palaeoclimatology and palaeoceanography from laminated sediments. editor / A.E.S. Kemp. Geological Society, London; Special Publication, 116, 1996. pp. 171-183
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