Figure 8From: UK monitoring and deposition of tephra from the May 2011 eruption of Grímsvötn, IcelandGrímsvötn tephra collected on pollen slides. Grains deposited in raindrops in Exeter, UK, on 25 May 2011. Rings are ∼50 μ m wide and contain 50–100 grains with a modal diameter of 4 μ m (see inset).Back to article page