Fig. 4From: Assessment of the potential respiratory hazard of volcanic ash from future Icelandic eruptions: a study of archived basaltic to rhyolitic ash samplesSelected scanning electron micrographs of volcanic ash samples. (a) Askja-55d, (b) Askja-56a, (c) Askja-59b, (d) Hekla-1980, (e) Hekla-4, (f) Katla-1755, (g) Laki-SnVII, (h) Orae-s1, (i) Orae-s13, (j) Reyk-1227, (k) Snae-1 and (l) Veid-1477. All images were collected at 8.0 kV and ~14 mm working distanceBack to article page