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Earth's crust
Answer for the clue "Earth's crust ", 4 letters:
sial
Alternative clues for the word sial
Word definitions for sial in dictionaries
WordNet
Word definitions in WordNet
n. the granite-like rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum
Wiktionary
Word definitions in Wiktionary
n. (context geology English) The rocks rich in silicon and aluminum that form the upper layer of the earth's crust, which lies beneath all continental landmasses.
Usage examples of sial.
The upper and lighter layer, fifteen miles thick, was composed of lighter rock known by the invented word sial, indicating silicon and aluminum.