Soils developed on volcanic materials in the island of Thera, Greece

dc.contributor.author	Moustakas, NK	en
dc.contributor.author	Georgoulias, F	en
dc.date.accessioned	2014-06-06T06:46:43Z
dc.date.available	2014-06-06T06:46:43Z
dc.date.issued	2005	en
dc.identifier.issn	00167061	en
dc.identifier.uri	http://dx.doi.org/10.1016/j.geoderma.2004.12.039	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/3158
dc.subject	Amorphous silica	en
dc.subject	Andisols	en
dc.subject	Mediterranean climate	en
dc.subject	Rhyodacitic pumice	en
dc.subject.other	Amorphous silicon	en
dc.subject.other	Extraction	en
dc.subject.other	Ion exchange	en
dc.subject.other	pH effects	en
dc.subject.other	Positive ions	en
dc.subject.other	Silica	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Textures	en
dc.subject.other	Volcanoes	en
dc.subject.other	Amorphous silica	en
dc.subject.other	Andisols	en
dc.subject.other	Mediterranean climate	en
dc.subject.other	Rhyodacitic pumice	en
dc.subject.other	Soils	en
dc.subject.other	Andisol	en
dc.subject.other	parent material	en
dc.subject.other	pedogenesis	en
dc.subject.other	soil analysis	en
dc.subject.other	soil property	en
dc.subject.other	volcanic soil	en
dc.subject.other	Eastern Hemisphere	en
dc.subject.other	Eurasia	en
dc.subject.other	Europe	en
dc.subject.other	Greece	en
dc.subject.other	Southern Europe	en
dc.subject.other	World	en
dc.subject.other	Thera	en
dc.title	Soils developed on volcanic materials in the island of Thera, Greece	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.geoderma.2004.12.039	en
heal.publicationDate	2005	en
heal.abstract	Samples were taken of soils formed on volcanic material, primarily composed of rhyodacitic pumice, on the island of Thera, Greece (South Aegean Sea, Southeastern Mediterranean), and analyses for physical and chemical properties carried out. These soils are characterised as having a coarse texture, low organic matter content, low cation exchange capacity (CEC) and soil moisture retention, but a high pH despite the acidic nature of the parent material. Extraction with sodium dithionite-citrate, acid ammonium oxalate, sodium pyrophosphate and hot 0.5 M NaOH showed that, in contrast to soils usually forming on volcanic material worldwide, soils lack noncrystalline minerals like allophane, imogolite, ferrihydrite and iron and aluminium humus complexes. The only noncrystalline mineral present and, in great quantities, is amorphous silica. Winds, prevailing practically all year round, transfer droplets of seawater to these soils which in combination with the great porosity, relatively high sodium content of the parent material and low rainfall are the primary factors in the poor development of these soils and high pH. No andic properties are apparent and, hence, these soils cannot be classified as Andisols. The major factors determining soil genesis on the island of Thera would appear to be the nature of the parent material and the climate. © 2004 Elsevier B.V. All rights reserved.	en
heal.journalName	Geoderma	en
dc.identifier.issue	3-4	en
dc.identifier.volume	129	en
dc.identifier.doi	10.1016/j.geoderma.2004.12.039	en
dc.identifier.spage	125	en
dc.identifier.epage	138	en