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General Information
File Identifier: gov.noaa.ngdc.mgg.geology:G02885
Metadata Date Stamp: 2014-05-05
Organization: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Organization Role: pointOfContact
Identification Information
Title: Biogenic Silica and Carbon 14 Age Dates from Lake Victoria Cruise V95 Cores
Dataset Publication Date: 1997-11-03
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. 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.
Credit Dr. David J. DeMaster, University of Minnesota Large Lakes Observatory, with funding from the US National Science Foundation IDEAL project.
Constraints Access to this dataset is unrestricted.
Data Type: Vector
Browse Graphic
Browse Graphic URL: http://www.ngdc.noaa.gov/mgg/image/geolin/preview94075001.gif
Browse Graphic Caption: sample locations in study area
Browse Graphic Type: GIF
Data Theme
Theme Topics: Geological and Geophysical, Oceans and Estuaries
Reference System Information
Reference System URN: urn:ogc:def:crs:EPSG:4326
Spatial Domain
West Bounding Longitude: 32.8285
South Bounding Latitude: -1.593
East Bounding Longitude: 33.4553
North Bounding Latitude: -0.4605
Zoom to the resource envelope
Beginning Date: 1995-04-08
Ending Date: 1995-04-12
Data Quality Information
Scope (quality information applies to): Dataset
Data History: Lineage prior to transfer to NGDC is unknown.
Contact Information
Organization: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Contact Position: Marine Geology Data Manager
Address: 325 Broadway, Mail Code E/GC3
City: Boulder
State: CO
Postal Code: 80305-3328
Country: USA
Email: geology.info@noaa.gov
Telephone: (303) 497-6339
Fax: (303) 497-6513
Distribution Information
Format Name: ASCII
Format Version: UTF-8
Distribution Link: http://www.ngdc.noaa.gov/mgg/geology/llo.html
Distribution Link Function: Information
Metadata Reference Information
Acquisition Information
Instrument: various
Platform: In Situ Ocean-based Platforms > SHIPS
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