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  • 1
    Publication Date: 2017-01-07
    Description: The interaction of climate and geology in Central Africa during Late Pleistocene and Holocene is examined. The study is based on sedimentological and limnological work on the main lakes of the Western Branch of the East African Rift Valley, particularly Lake Kivu, Changes in sediment chemistry, mineralogy and diatom assemblage provide a detailed histogram of lake level oscillations. Calculations indicate that the drop in lake level could be as high as 600 m for Tanganyika and 400 m for Kivu, Fluctuations in water levels.are the means for reconstruction of climatic events in tropical Africa of the last 15,000 years. Paleoclimatic comparison between tropical and temperate zones reveals that pluvial times coincide with the prominent interstadials in Europe, e.g. Bølling, Allerød, Climatic Optimum, and reversely, cool and dry periods in equatorial Africa with ice ages in the Northern Hemisphere. The African climatic sequence of pluvials and interpluvials is accompanied by corresponding periods of hydrothermal activity and quiescence. This may suggest that rain water exercises control on hydrothermal. activities.
    Description: Prepared for the National Science Foundation under Grants GA-30641 and GA-35334.
    Keywords: Paleoclimatology ; Limnology
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: application/pdf
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  • 2
    Publication Date: 2017-01-05
    Description: Originally issued as Reference No. 66-27, series later renamed WHOI-.
    Description: Largely for reason of limited space, scientific journals can only accept brief articles. Thus full accounts on analytical techniques, data files, and other details are frequently omitted, and pertinent information may be lost. Although this information is only of peripheral interest to the general reader, to the fellow scientist it is of vital significance. In order to serve both the specialist and the general reader, we have prepared a series of manuscripts dealing exclusively with either background information or the actual interpretation and discussion of the data. The present report is aimed chiefly at the specialist interested in calcification processes in biological systems, in molluscan ecology and phylogeny, and in amino acid analyses. It incorporates information on: (a) type, locality, and environment of sample material, (b) analytical techniques, (c) utilization of a digital computer and (d) quantitative amino acid analysis in the form of data sheets, i,e. computer printouts.
    Description: The work was supported by grants from the National Aeronautics and Space Administration (NSR-22-014-001) and the American Chemical Society (PRF-1943-A2).
    Keywords: Amino acids ; Mollusks
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: application/pdf
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  • 3
    Publication Date: 2017-01-04
    Description: Originally issued as Reference No. 68-4, series later renamed WHOI-.
    Description: In February-March 1965, a series of piston cores were taken aboard ATLANTIS II off the coast of Arabia, Pakistan, and India (Figure 1) in water depths of about 3,000 meters. The principal objectives of this program were (a ) to obtain information on the change in petrology of the sediments as a function of geography and depth (b) to study the microfauna in the sediment profiles, and (c) to apply geochemical tools for the elucidation of the diagenetic fate of the organic matter and the history of the sediments. This article presents data on the geochemical part of the project. Principally, we are concerned with the oxygen and carbon isotope distribution in carbonates, the carbon isotope composition of sedimentary organic matter, and the amino acid composition of the sediment material. These studies represent a part of a larger program at our Institute which is concerned with the distribution of (a) stable isotopes and (b) organic compounds such as amino acids, carbohydrates, or hydrocarbons in recent and ancient sediments, natural waters, and marine organisms.
    Description: National Science Foundation under Grant GP-4904
    Keywords: International Indian Ocean Expedition (1960-1965) ; Atlantis II (Ship : 1963-) Cruise AII15 ; Marine sediments ; Amino acids
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: application/pdf
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