| 11. | The lack of distinct layering indicates that clams, shrimps, and other burrowing organisms mixed the bottom sediments.
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| 12. | In 1928, Pettersson asked her to analyze a sample of sea bottom sediment to determine its radium content.
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| 13. | He developed the technique of using explosive charges to determine the type of ocean bottom sediments and their thickness.
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| 14. | The EPA estimates there are between 500, 000 and 700, 000 pounds of PCBs still trapped in river-bottom sediment.
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| 15. | The major part of the heavy metals transported to Lake Poop?seem to be immobilized in the bottom sediments.
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| 16. | The earth s surface soils, water bodies and bottom sediments are thought to be the primary biospheric sinks for mercury.
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| 17. | The sinker often had a small container attached to it that would allow for the collection of bottom sediment samples.
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| 18. | It was thought that the river's velocity would scour off bottom sediments, deepening the river and decreasing the possibility of flooding.
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| 19. | A study commissioned by Polk County in 1994 found the high level of effluent resulted in nutrient recycling from lake bottom sediments.
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| 20. | It is the shifting tides, by the way, stirring up the river-bottom sediment that are responsible for the river's characteristic mud-brown color.
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