sial
9.9
The hard rocks in the Earth's outer crust that contain silicon and aluminium
- noun
- /ˈsaɪəl/
- Specialized
:
sial
- Mountains are primarily formed from layers of sial, which contribute to their grandeur.
Examples
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In geology classes, we learned that sial is abundant in minerals like quartz and feldspar.
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Edla: Hialmar Sial.
Academic text (1996) -
The geologists studied the composition of the sial to understand its impact on the Earth's stability.
Surface Forms
Etymology
Sial comes from the chemical parts Si (from silicon) and Al (from aluminum), so the name points to rocks that are rich in silicon and aluminum. That's why sial refers to the lighter, granite-like layer of the Earth's crust.
