Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores
Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores
Metadata from the NOAA Metadata Manager and Repository (NMMR)
- Identification Information:
-
- Dataset Identifier:
- gov.noaa.ngdc:G02885
- Citation:
-
- Citation Information:
-
- Originator:
- Dr. D.J. DeMaster, University of Minnesota Large Lakes Observatory
- Publication Date:
- 19770819
- Title:
- Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores
- Geospatial Data Presentation Form:
- Tabular Digital Data
- Series Information:
-
- Series Name:
- Marine Geology Data File
- Issue Identification:
- MGG94075001
- Publication Information:
-
- Publication Place:
- Boulder, CO USA
- Publisher:
- US Department of Commerce, National Oceanic and Atmospheric Administration (NOAA), NOAA Satellite and Information Service (NESDIS), National Geophysical Data Center (NGDC) and World Data Center for Marine Geology and Geophysics, Boulder.
- Other Citation Details:
- DeMaster, D.J. (1979) , The Marine Budgets of Silica and 32Si. Ph. D. Thesis, Yale University. pp 246-264. Johnson, T. C., C. A. Scholz, M. R. Talbot, K. Kelts, R. D. Ricketts, G.Ngobi, K. Beuning, I. Ssemmanda and J. McGill, 1996. Late Pleistocene desiccation of Lake Victoria and rapid evolution of cichlid fishes.Science, v.273, p. 1091-1093... Beuning, K., K. Kelts and T. C. Johnson, in press. Paleohydrology of Lake Victoria, East Africa inferred from 18O/16O ratios in sediment cellulose. Geology. Johnson, T. C., Y. Chan, K. Beuning, K. Kelts, G. Ngobi and D. Verschuren, in press. Biogenic silica profiles in Holocene cores from Lake Victoria: implications for lake level history and initiation of the Victoria Nile. In: Lehman, J. T. (Editor), Environmental Change and Response in East African Lakes. Kluwer Press, Amsterdam. Verschuren, D., D. N. Edgington, H. J. Kling and T. C. Johnson, in press. The eutrophication of Lake Victoria: sedimentary signals at offshore stations. Journal of Gt. Lakes Research. Scholz, C. A., T. C. Johnson, P. Cattaneo, H. Malinga and S. Shana, in press. Initial results of 1995 IDEAL seismic reflection survey of Lake Victoria, Uganda and Tanzania. In: Lehman, J. T. (Editor), Environmental Change and Response in East African Lakes. Kluwer Press, Amsterdam. Data produced by: Large Lakes Observatory, University of Minnesota, Duluth, 213 Research Laboratory Building, 2205 East 5th Street, Duluth, MN 55812-2401 email: tcj@d.umn.edu http://www.d.umn.edu/llo/
- Description:
-
- Abstract:
- 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. 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.
- Purpose:
- These data are intended for paleoenvironmental studies.
- Time Period of Content:
-
- Time Period Information:
-
- Range of Dates/Times:
-
- Beginning Date:
- 19950408
- Ending Date:
- 19950412
- Currentness Reference:
- Publication Date
- Status:
-
- Progress:
- Complete
- Maintenance and Update Frequency:
- None Planned
- Spatial Domain:
-
- Bounding Coordinates:
-
- West Bounding Coordinate:
- 32.820000
- East Bounding Coordinate:
- 33.860000
- North Bounding Coordinate:
- -0.460000
- South Bounding Coordinate:
- -1.600000
- Keywords:
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- Theme:
-
- Theme Keyword Thesaurus:
- ISO 19115 Topic Category
- Theme Keyword:
- geoscientificInformation
- Theme Keyword:
- oceans
- Theme:
-
- Theme Keyword Thesaurus:
- NASA/GCMD Earth Science Keywords
- Theme Keyword:
- EARTH SCIENCE > Paleoclimate > Ocean/Lake Records > Sediments
- Theme Keyword:
- EARTH SCIENCE > PALEOCLIMATE > Ocean/Lake Records > Isotopes
- Theme Keyword:
- EARTH SCIENCE > PALEOCLIMATE > Ocean/Lake Records > Radiocarbon
- Theme Keyword:
- EARTH SCIENCE > PALEOCLIMATE > Ocean/Lake Records > Stratigraphic Sequence
- Theme Keyword:
- EARTH SCIENCE > Solid Earth > Rocks/Minerals > Sediments
- Theme:
-
- Theme Keyword Thesaurus:
- INFOTERRA Keyword Thesaurus
- Theme Keyword:
- INFOTERRA > Subject Disciplines > Geology > Geology
- Theme Keyword:
- INFOTERRA > Subject Disciplines > Marine Geology > Marine Geology
- Theme Keyword:
- INFOTERRA > Subject Disciplines > Organic Chemistry > Organic Chemistry
- Theme Keyword:
- INFOTERRA > Subject Disciplines > Climate Studies
- Theme:
-
- Theme Keyword Thesaurus:
- CIESIN Keyword Thesaurus
- Theme Keyword:
- CIESIN > Environmental Protection > Environmental Monitoring
- Theme Keyword:
- CIESIN > Environmental Protection > Environmental Modeling > Climate Modeling
- Theme Keyword:
- CIESIN > Environmental Protection > Climate > Climate Change
- Theme:
-
- Theme Keyword Thesaurus:
- NASA/GCMD Data Center Keywords
- Theme Keyword:
- WDC/MGG, BOULDER > World Data Center for Marine Geology and Geophysics, Boulder
- Theme Keyword:
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
- Place:
-
- Place Keyword Thesaurus:
- NASA/GCMD Location Keywords
- Place Keyword:
- Continent > Africa
- Access Constraints:
- No Constraints
- Use Constraints:
- None
- Point of Contact:
-
- Contact Information:
-
- Contact Organization Primary:
-
- Contact Organization:
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
- Contact Person:
- Carla J. Moore
- Contact Address:
-
- Address Type:
- Mailing and Physical Address
- Address:
- NOAA/NESDIS/NGDC 325 Broadway
- City:
- Boulder
- State or Province:
- CO
- Postal Code:
- 80305-3328
- Country:
- USA
- Contact Voice Telephone:
- (303) 497-6339
- Contact TDD/TTY Telephone:
- (303) 497-6958
- Contact Facsimile Telephone:
- (303) 497-6513
- Contact Electronic Mail Address:
- Carla.J.Moore@noaa.gov
- Hours of Service:
- 7:30 - 5:00 Mountain
- Contact Instructions:
- Contact Data Center
- Browse Graphic:
-
- Browse Graphic File Name:
-
http://www.ngdc.noaa.gov/mgg/image/geolin/preview94075001.gif
- Browse Graphic File Description:
- location of coring
- Browse Graphic File Type:
- GIF
- Data Set Credit:
- Dr. D.J. DeMaster, University of Minnesota Large Lakes Observatory, with funding from the US National Science Foundation IDEAL project.
- Native Data Set Environment:
- ASCII text files, Excel Spreasheet
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- Distribution Information:
-
- Distributor:
-
- Contact Information:
-
- Contact Organization Primary:
-
- Contact Organization:
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
- Contact Person:
- Carla J. Moore
- Contact Address:
-
- Address Type:
- Mailing and Physical Address
- Address:
- NOAA/NESDIS/NGDC 325 Broadway
- City:
- Boulder
- State or Province:
- CO
- Postal Code:
- 80305-3328
- Country:
- USA
- Contact Voice Telephone:
- (303) 497-6339
- Contact TDD/TTY Telephone:
- (303) 497-6958
- Contact Facsimile Telephone:
- (303) 497-6513
- Contact Electronic Mail Address:
- Carla.J.Moore@noaa.gov
- Hours of Service:
- 7:30 - 5:00 Mountain
- Contact Instructions:
- Contact Data Center
- Resource Description:
- Downloadable Data
- Distribution Liability:
- 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.
- Standard Order Process:
-
- Digital Form:
-
- Digital Transfer Information:
-
- Format Name:
- ASCII
- Digital Transfer Option:
-
- Online Option:
-
- Computer Contact Information:
-
- Network Address:
-
- Network Resource Name:
-
http://www.ngdc.noaa.gov/mgg/geology/94075001.html
- Fees:
- free for online download
- Custom Order Process:
- Contact data center for information
- Technical Prerequisites:
- Contact data center for information
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- Metadata Reference Information:
-
- Metadata Date:
- 20070703
- Metadata Contact:
-
- Contact Information:
-
- Contact Organization Primary:
-
- Contact Organization:
- DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
- Contact Person:
- Carla J. Moore
- Contact Address:
-
- Address Type:
- Mailing and Physical Address
- Address:
- NOAA/NESDIS/NGDC 325 Broadway
- City:
- Boulder
- State or Province:
- CO
- Postal Code:
- 80305-3328
- Country:
- USA
- Contact Voice Telephone:
- (303) 497-6339
- Contact TDD/TTY Telephone:
- (303) 497-6958
- Contact Facsimile Telephone:
- (303) 497-6513
- Contact Electronic Mail Address:
- Carla.J.Moore@noaa.gov
- Hours of Service:
- 7:30 - 5:00 Mountain
- Contact Instructions:
- Contact Data Center
- Metadata Standard Name:
- Content Standards for Digital Geospatial Metadata
- Metadata Standard Version:
- FGDC-STD-001-1998
- Metadata Access Constraints:
- none
- Metadata Use Constraints:
- none
- Metadata Extensions:
-
- Online Linkage:
-
http://www.ngdc.noaa.gov/metadata/extensions/local_extensions.html
- Profile Name:
- NGDC Extensions to FGDC Metadata
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