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A sample of ice-rafted debris (IRD), or sediment. The individual grains of microscopic-size debris are counted to obtain the percentage of grains in a gram of sediment. The percentage varies when ice-rafting increases or decreases, or if the number of organisms increase or decrease. |
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Rounded quartz grains from ice-rafted debris |
An angular quartz grain from ice-rafted sediment
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For more information, contact Rusty Lotti Bond
(curator@ldeo.columbia.edu). Comments are welcomed. Last update of this page was January 20, 2001.
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