Ash analysis 2010 eruptions of Eyjafjallajökull

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upper: ash covers thórsmörk valley in june 2010, after eruption lower: same area, in september 2011


samples of volcanic ash collected near eruption showed silica concentration of 58%—much higher in lava flows. concentration of water-soluble fluoride one-third of concentration typical in hekla eruptions, mean value of 104 mg of fluoride per kg of ash. agriculture important in region of iceland, , farmers near volcano have been warned not let livestock drink contaminated streams , water sources, high concentrations of fluoride can have deadly renal , hepatic effects, particularly in sheep.








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