Jökull - 01.01.2016, Page 81

Grain characteristics of silicic Katla tephra layers
Flowers, G. E., H. Björnsson, Á. Geirsdóttir, G. H. Miller,
J. L. Black, G. K. C. Clarke 2008. Holocene cli-
mate conditions and glacier variation in central Ice-
land from physical modelling and empirical evidence.
Quat. Sci. Rev. 27, 798–813.
Francis, P. 2001. Volcanoes A Planetary Perspective. Ox-
ford: Clarendon Press, 443 pp.
Francis, P. and C. Oppenheimer 2004. Volcanoes. New
York: Oxford University Press Inc., 521 pp.
Gröndal, G. O., G. Larsen and S. Elefsen 2005. Stærðir
forsögulegra hamfaraflóða í Markarfljóti – mæling á
farvegum neðan Einhyrningsflata. (Magnitudes of pre-
historic catastrophic floods in the Markarfljót river –
survey of flood channels south of Einhyrningsflatir.)
In: Guðmundsson, M. T. and Á G. Gylfason (eds.).
Hættumat vegna eldgosa og hlaupa frá vestanverðum
Mýrdalsjökli og Eyjafjallajökli. The National Com-
missioner of the Icelandic Police and the University
Press, Reykjavík, 99–104.
Guðmundsdóttir, E. R. 1998. Gjóska úr Kötlugosi 1755.
Ásýnd, kornastærð og kornalögun. B.Sc. Thesis, Univ.
Iceland, Reykjavík, 64 pp.
Guðmundsson, M. T., T. Thordarson, Á. Höskuldsson,
G. Larsen, H. Björnsson, F. J. Prata, B. Oddson, E.
Magnússon, Th. Högnadóttir, G. N. Petersen, C. L.
Hayward, J. A. Stevenson and I. Jónsdóttir 2012. Ash
generation and distribution from the April-May 2010
eruption of Eyjafjallajokull, Iceland. Scientific reports
2 (572), 12 pp.
Hall, V. A. and J. R. Pilcher 2002. Late-Quaternary Ice-
landic tephras in Ireland and Great Britain: detec-
tion, characterization and usefulness. The Holocene
12, 223–230.
Heiken, G. 1974. An Atlas of Volcanic Ash. Smithsonian
Contr. Earth Sci. 12.
Heiken, G. and K. Wohletz1985. Volcanic Ash. Berkeley,
University of California Press, 246 pp.
Houghton, B., C. Wilson, R. Smith and J. Gilbert
2000. Phreatoplinian eruptions. In: H. Sigurdsson, B.
Houghton, S. R. McNutt, H. Rymer, J. Stix (eds), En-
cyclopedia of Volcanoes. Academic Press, San Diego,
513–525.
Jakobsson, S. P. 1979. Petrology of recent basalts of the
Eastern Volcanic Zone, Iceland. Acta Naturalia Isl. 26,
1–103.
Kratzmann, D. J., S. Carey, R. Scasso, and J. A. Naranjo
2009. Compositional variations and magma mixing in
the 1991 eruptions of Hudson volcano, Chile. Bull.
Volcanol. 71, 419–439.
Lacasse, C., H. Sigurdsson, H. Jóhannesson, M. Paterne,
and S. N., Carey, L. E. 1995. Source of Ash Zone 1 in
the North Atlantic. Bull. Volcanol. 57, 18–32.
Lacasse, C., H. Sigurdsson, S. N. Carey, H. Jóhannesson,
L. E. Thomas and N. W. Rogers, 2007. Bimodal vol-
canism at the Katla subglacial caldera, Iceland: in-
sight into the geochemistry and petrogenesis of rhy-
olitic magmas. Bull. Volcanol. 69, 373–399.
Larsen, G. 2000. Holocene eruptions within the Katla vol-
canic system, south Iceland: Characteristics and envi-
ronmental impact. Jökull 49, 1–28.
Larsen, G., A. J. Newton, A. J. Dugmore and E. G. Vil-
mundardóttir 2001. Geochemistry, dispersal, volumes
and chronology of Holocene silicic tephra layers from
the Katla volcanic system, Iceland. J. Quat. Sci. 16,
119–132.
Larsen, G., K. Smith, A. Newton and Ó. Knudsen 2005.
Jökulhlaup til vesturs frá Mýrdalsjökli: Ummerki um
forsöguleg hlaup niður Markarfljót. (Volcanogenic
floods towards west from Mýrdalsjökull ice cap: indi-
cations of prehistoric floods in the Markarfljót river.)
In: Magnús T. Guðmundsson og Ágúst G. Gylfason
(eds.): Hættumat vegna eldgosa og hlaupa frá vestan-
verðum Mýrdalsjökli og Eyjafjallajökli. The National
Commissioner of the Icelandic Police and the Univer-
sity Press, Reykjavík, 75–98.
Larsen, G. 2010. Katla: Tephrochronology and eruption
history. Developm. Quat. Sci. 13, 23–49.
Maizels, J. 1994. The origin and evolution of Holocene
sandur deposits in areas of jökulhlaup drainage, Ice-
land. In: Maizels, J. K. and C. Caseldine, (eds.). En-
vironmental change in Iceland: past and present.
Kluwer Academic Publishers, Dordrecht, 267–302.
Micromeritics 2010. SediGraph III 5120, Operator’s Man-
ual (V1.04). Norcross, GA.
Morrisey, M., B. Zimanowski, K. Wohletz and R. Büttner
2000. Phreatomagmatic fragmentation. In: Sigurðs-
son, H., B. Houghton, S. R. Mcnutt, H. Rymer, and
J. Stix (eds.), Encyclopedia of Volcanoes. San Diego,
Academic Press. 431–445.
Newton, A. 1999. Ocean transported pumice in the North
Atlantic. PhD thesis, Univ. Edinburgh, 394 pp.
Óladóttir, B. A. 2003. Gjóskulagið E2 úr Kötlu; korna-
lögun og kornastærð. B.Sc. Thesis, Univ. Iceland,
Reykjavík, 90 pp.
Óladóttir, B. A., G. Larsen, Þ. Þórðarson and O. Sigmars-
son 2005. The Katla volcano S-Iceland: Holocene
tephra stratigraphy and eruption frequency. Jökull 55,
53–74.
JÖKULL No. 66, 2016 81