sialliten.
/ˈsʌɪəlʌɪt/ Geology.
Weathered rock that is largely composed of hydrous aluminium silicates and is highly leached of alkalis.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > metamorphic rock > [noun] > other metamorphics
quartzite1823
mica-schist1826
amphibolite1833
hornfels1854
phthanite1854
hornblendite1874
psammite1882
tourmaline-rock1882
tourmaline-schist1882
jasperoid1898
skarn1901
metagabbro1904
metabasite1907
verdite1908
rodingite1911
siallite1933
tonstein1961
greenlandite1981
1933 H. Greene tr. Vageler Introd. Trop. Soils v. 140 The soil becomes podsolised. The long-held opinion that this produces not merely siallites in general but a quite special kaolin and kaolinite can no longer be maintained.
Derivatives
siaˈllitic adj.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > metamorphic rock > [adjective] > other metamorphics
quartzitic1849
psammitic1882
phyllitic1888
siallitic1933
hornfelsic1951
rodingitic1953
1933 H. Greene tr. Vageler Introd. Trop. Soils v. 127 Where the amount of water is small and the period of action is short, as in the case of arid and semi-arid districts, siallitic and allitic bodies are formed in small amount.
1965 B. T. Bunting Geogr. Soil xiv. 168 Other forms of brown earth are formed on siallitic parent materials which may overlie chalk.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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n.1933