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Dataset Overview | National Centers for Environmental Information (NCEI)

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.
  • Cite as: David J. DeMaster. 1997: Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores. First. NOAA National Centers for Environmental Information. Accessed [date].
  • ID not available.
gov.noaa.ngdc.mgg.geology:G02885
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    • File Specification: American Standard Code for Information Interchange (ASCII) text format.
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    • File Specification: compressed Tape ARchive file
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Distributor NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact Marine Geology Data Manager
NOAA National Centers for Environmental Information
geology.info@noaa.gov
Coverage Description Lake Victoria, East Africa
Time Period 1995-04-08 to 1995-04-12
Spatial Reference System urn:ogc:def:crs:EPSG:4326
Spatial Bounding Box Coordinates
West: 32.8285
East: 33.4553
South: -1.593
North: -0.4605
Spatial Coverage Map
General Documentation
Associated Resources
  • The Marine Budgets of Silica and 32Si
  • Late Pleistocene desiccation of Lake Victoria and rapid evolution of cichlid fishes
  • Paleohydrology of Lake Victoria, East Africa inferred from 18O/16O ratios in sediment cellulose
  • Biogenic silica profiles in Holocene cores from Lake Victoria: implications for lake level history and initiation of the Victoria Nile
  • The eutrophication of Lake Victoria: sedimentary signals at offshore stations
  • Initial results of 1995 IDEAL seismic reflection survey of Lake Victoria, Uganda and Tanzania
  • Index to Marine and Lacustrine Geological Samples (IMLGS)
    • Parent Database
      The parent IMLGS database contains more/related data and information.
  • NCEI Marine Geology Data Archive
    • Parent Archive
      Information about the Marine Geology Data Archive at NCEI.
  • Paleoclimatology Datasets
  • NOAA/NCEI Marine Geology WAF
Publication Dates
  • 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 - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
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
  • Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.
Dataset Citation
  • Cite as: David J. DeMaster. 1997: Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores. First. NOAA National Centers for Environmental Information. Accessed [date].
Cited Authors
  • David J. DeMaster
    Department of Marine, Earth and Atmospheric Sciences, North Carolina State University
Publishers
  • NOAA National Centers for Environmental Information
Acknowledgments
  • Dr. David J. DeMaster, University of Minnesota Large Lakes Observatory, with funding from the US National Science Foundation IDEAL project.
Theme keywords Library of Congress Subject Headings
  • Scientific archives
  • Electronic records
  • Geology
USDA National Agricultural Library's Agricultural Thesaurus (NALT)
  • lacustrine sediments
Global Change Master Directory (GCMD) Science Keywords
  • 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 Keyword Thesaurus
  • CIESIN > Environmental Protection > Environmental Modeling > Climate Modeling
  • CIESIN > Environmental Protection > Climate > Climate Change
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • In Situ Ocean-based Platforms > Ships
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • In Situ/Laboratory Instruments > Corers > Coring Devices
  • In Situ/Laboratory Instruments > Corers > Sediment Corers
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • CONTINENT > AFRICA > EASTERN AFRICA > LAKE VICTORIA
Project keywords Global Change Master Directory (GCMD) Project Keywords
  • Unknown
  • ICSU-WDS > International Council for Science - World Data System
Use Constraints
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
  • 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
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
  • Access to this dataset is unrestricted.
Other Constraints Cite as: David J. DeMaster. 1997: Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores. First. NOAA National Centers for Environmental Information. Accessed [date].
Fees
  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: dataset
Lineage Statement lineage prior to transfer to NCEI is unknown.
Processing Environment Native Dataset Environment: ASCII text
Source Datasets
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Acquisition Information (collection)
Instrument
  • various
Platform
  • In Situ Ocean-based Platforms > SHIPS
Last Modified: 2020-04-21
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