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- Sial abstract "This article is about the composition of the Earth's crust. For other uses, see Sial (disambiguation).In geology, the sial is the upper layer of the Earth's crust made of rocks rich in silicates and aluminium minerals. It is sometimes equated with the continental crust because it is absent in the wide oceanic basins, but "sial" is a geochemical term rather than a plate tectonic term. As these elements are less dense, they tend to be concentrated in the upper layer of the crust.Geologists often refer to the rocks in this layer as felsic, because they contain high levels of feldspar, an aluminium silicate mineral series. However, the sial "actually has quite a diversity of rock types, including large amounts of basaltic rocks."The name 'sial' was taken from the first two letters of silica and of aluminium. The sial is often contrasted to the 'sima,' the next lower layer in the Earth, which is often exposed in the ocean basins; and the nickel-iron alloy core. These divisions of the Earth's interior (with these names) were first proposed by Eduard Suess in the 19th century. This model of the outer layers of the earth has been confirmed by petrographic, gravimetric, and seismic evidence.".
- Sial thumbnail Precambrian_Granite_St_Francis_Mountains_Missouri.jpg?width=300.
- Sial wikiPageID "1589335".
- Sial wikiPageRevisionID "547404975".
- Sial hasPhotoCollection Sial.
- Sial subject Category:Petrology.
- Sial subject Category:Structure_of_the_Earth.
- Sial comment "This article is about the composition of the Earth's crust. For other uses, see Sial (disambiguation).In geology, the sial is the upper layer of the Earth's crust made of rocks rich in silicates and aluminium minerals. It is sometimes equated with the continental crust because it is absent in the wide oceanic basins, but "sial" is a geochemical term rather than a plate tectonic term.".
- Sial label "Sial (géologie)".
- Sial label "Sial".
- Sial label "Sial".
- Sial label "Sial".
- Sial label "Sial".
- Sial label "صخور السيال".
- Sial label "シアル".
- Sial sameAs Sial.
- Sial sameAs Sial_(géologie).
- Sial sameAs Sial.
- Sial sameAs シアル.
- Sial sameAs 시알.
- Sial sameAs Sial.
- Sial sameAs m.05dsvj.
- Sial sameAs Q680835.
- Sial sameAs Q680835.
- Sial wasDerivedFrom Sial?oldid=547404975.
- Sial depiction Precambrian_Granite_St_Francis_Mountains_Missouri.jpg.
- Sial isPrimaryTopicOf Sial.