Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores
sample locations in study area
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 this dataset when used as a source.
- David J. DeMaster
Department of Marine, Earth and Atmospheric Sciences, North Carolina State University
- National Geophysical Data Center, NOAA
- publication: 1997-11-03
- revision: 1997-11-03
|Data Presentation Form:
|| Digital table - digital representation of facts or figures systematically displayed,
especially in columns
|Dataset Progress Status
|Data Update Frequency:
|| Not planned -
Completed data set, no additions planned.
||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.
| 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.
||1995-04-08 to 1995-04-12
|Spatial Reference System:
|Spatial Bounding Box Coordinates:
|Spatial Coverage Map:
- Scientific archives
- Electronic records
- 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
- WDC/GEOPHYSICS, BOULDER > World Data Center for Geophysics, Boulder
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
- In Situ Ocean-based Platforms > SHIPS
- In Situ/Laboratory Instruments > Corers > CORING DEVICES
- In Situ/Laboratory Instruments > Corers > SEDIMENT CORERS
- CONTINENT > AFRICA > EASTERN AFRICA > LAKE VICTORIA
| 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.
||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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