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sial

 [sahy-al]  

si·al

   [sahy-al]
noun Geology.
the assemblage of rocks, rich in silica and alumina, that comprise the continental portions of the upper layer of the earth's crust.
Compare sima1.

Origin:
1920–25; < German, equivalent to Si(licium) silicium + Al(uminium) aluminum

Related forms
si·al·ic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Sial is always a great word to know.
So is strata. Does it mean:
single bed of sedimentary rock, consisting of one kind of matter representing continuous deposition
seepage of water into soil or rock
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Collins
World English Dictionary
sial (ˈsaɪəl)
 
—n
the silicon-rich and aluminium-rich rocks of the earth's continental upper crust, the most abundant individual rock being granite
 
[C20: si(licon) + al(uminium)]
 
sialic
 
—adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Related Words
sima
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