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Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores

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The LLO operates in conjunction with the Limnological Research Center (LRC) in working towards fulfilling the objectives of the International Decade for the East African Lakes (IDEAL) to study the East African Lakes. The Lake Victoria project is funded by NSF. Like Lake Victoria, extensive work is being continued on Lake Malawi, Lake Turkana, and Lake Edward. In addition to the East African lakes, the LLO is working on Lake Issyk Kul', Lake Nicaragua, and Lake Superior. Summary: The Biogenic Silica Data file contains data for 5 cores taken from various sites in Lake Victoria. The data include ship, coring date, water depth, latitude/longitude, sampling device, sampled interval, % biogenic silica, and 14C dates. Cores were sampled at 10 cm intervals for biogenic silica analysis. Samples taken for 14C dating were prepared at the LRC Laboratory and sent to an outside AMS Facility for analysis. Pollen, charcoal, and plant macrofossils were dated. Biogenic Silica analysis was done using a timed, wet extraction technique adapted from D. J. DeMaster (1979). The analysis was done using 0.5 M NaOH at 85 0C.

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Distribution Formats
  • ASCII (Version: UTF-8)
Distributor DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Point of Contact DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
(303) 497-6339
geology.info@noaa.gov
General Documentation
Author
  • David J. DeMaster
    Department of Marine, Earth and Atmospheric Sciences, North Carolina State University
Publisher
  • National Geophysical Data Center, NOAA
Date(s)
  • publication: 1997-11-03
  • revision: 1997-11-03
Edition: First
Data Presentation Form: Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete
Data Update Frequency: Not planned  -  Completed data set, no additions planned.
Supplemental Information: Biogenic Silica analysis was done using a timed, wet extraction technique adapted from DeMaster, D.J. (1979), The Marine Budgets of Silica and 32Si. Ph. D. Thesis, Yale University. pp 246-264. . The analysis was done using 0.5 M NaOH at 85 0C.
Purpose: paleoenvironmental studies
Use Limitations
  • Please cite the originator of the data set, the date downloaded, and the National Geophysical Data Center, NOAA, as the source of the data.
  • Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
Time Period: 1995-04-08  to  1995-04-12
Spatial Reference System: urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates:
N: -0.4605
S: -1.593
E: 33.4553
W: 32.8285
Spatial Coverage Map:
Themes
  • Scientific archives
  • Electronic records
  • Geology
  • lacustrine sediments
  • EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Sediments
  • EARTH SCIENCE > PALEOCLIMATE > Ocean/Lake Records > Isotopes
  • EARTH SCIENCE > PALEOCLIMATE > Ocean/Lake Records > Radiocarbon
  • EARTH SCIENCE > PALEOCLIMATE > Ocean/Lake Records > Stratigraphic Sequence
  • CIESIN > Environmental Protection > Environmental Modeling > Climate Modeling
  • CIESIN > Environmental Protection > Climate > Climate Change
Data Centers
  • WDC/GEOPHYSICS, BOULDER > World Data Center for Geophysics, Boulder
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Platforms
  • In Situ Ocean-based Platforms > SHIPS
Instruments
  • In Situ/Laboratory Instruments > Corers > CORING DEVICES
  • In Situ/Laboratory Instruments > Corers > SEDIMENT CORERS
Places
  • CONTINENT > AFRICA > EASTERN AFRICA > LAKE VICTORIA
Projects
  • Unknown
Use Constraints
  • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Access Constraints
  • Access to this dataset is unrestricted.
Fees
  • free online download
Source Datasets
Lineage Statement Lineage prior to transfer to NGDC is unknown.
Processing Environment Native Dataset Environment: ASCII text

Metadata Last Modified: 2014-05-05

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