Sima (Noun)
Meaning
Rock that form the continuous lower layer of the earth's crust; rich in silicon and magnesium.
Classification
Nouns denoting substances.
Examples
- The earth's crust is composed of a thick layer of sima, a type of rock rich in silicon and magnesium.
- Geologists believe that sima makes up the lower part of the earth's crust, beneath the sial layer.
- Sima is a dense rock that is thought to be the primary component of the oceanic crust.
- The boundary between the sima and sial layers is a significant geological feature that has been studied extensively.
- In terms of composition, sima is distinct from the more granitic sial layer that lies above it.