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The 10Be and Be contents of 22 of solid and solution) and that the equilibrium samples taken from seven locations in the Maurice constant is grain-size dependent. Manskaya and River-Union Lake system of southern New Jersey Drozdova [1968] speculate that the high Be are reported. Bulk 10Be contents range from 0.05 contents of certain coals may result from the to 2.7 dpm/kg and Be from<0.1 to 2 ppm. Silicate minerals separated from Union Lake sediments appear to have a constant surface concentration of 45 x 10 5 atom 10Be/cm2. Organic material is greatly enriched in Be: Hand-picked samples contain over 10 dpm/kg of 10Be and 5 ppm of Be.The deposition rate of 10Be in Union Lake is 41 atom/cm2s. •

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