Aridification of the Namib Desert; evidence from oceanic cores

Author(s): Siesser, William G.
Author Affiliation(s): Primary:
Univ. Cape Town, Mar. Geosci., Dep. Geol., Rondebosch, South Africa
Volume Title: Antarctic glacial history and world palaeoenvironments
Volume Author(s): van Zinderen Bakker, E. M., editor
Source: p.105-112; Tenth INQUA congress; Third SCAR symposium ; Symposium on Antarctic glacial history and world palaeoenvironments, Birmingham, United Kingdom, Aug. 17, 1977, edited by E. M. van Zinderen Bakker. Publisher: A. A. Balkema, Rotterdam, Netherlands
Note: In English; illus. incl. 2 plates, sketch maps
Summary: Extreme aridity in the Namib Desert is the result of several interacting atmospheric and oceanic phenomena of which the Benguela Current is one of the major controlling factors. These cold, upwelled waters cool moisture-laden sea breezes, and combined with the atmospheric factors, prevent rain from falling in the Namib. An earlier study concluded that the stage was set for the origin of the Namib Desert in Early Oligocene times when cold Antarctic Intermediate Water penetrated northwards. Sedimentological, paleontological, and geo-chemical data suggest that from Middle or Late Oligocene until Middle Miocene times, cold, upwelled water was weakly and spasmodically introduced within this system. A major cooling of the Benguela Current in Late Miocene times may be correlated with the development of the major antarctic ice cap in Middle Miocene-early Late Miocene times.
Year of Publication: 1978
Research Program: DSDP Deep Sea Drilling Project
Key Words: 24 Surficial Geology, Quaternary Geology; Africa; Algae; Arid environment; Biostratigraphy; Cenozoic; Deep Sea Drilling Project; Deposition; Diatoms; Foraminifera; Invertebrata; Microfossils; Namib Desert; Namibia; Paleoclimatology; Plantae; Protista; Quaternary; Rates; Sedimentation; Sediments; Site 362; Southern Africa; Stratigraphy; Terrestrial environment; Thallophytes
Record ID: 1981057510
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States

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