Part of the earth's crust

• Upper layer of earth's crust
• The granite-like rocks that form the outermost layer of the earth's crust
• Earth's crust
• Some of the upper crust is backing a Liberal
• Outer portion of the earth
• Rock formation

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.

Wikipedia Word definitions in Wikipedia
Sial may refer to: Sial the composition of the upper part of the Earth's crust Sial (tribe) , a people of Pakistan SIAL, the consortium which runs Sialkot International Airport