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Geology (204)
GEOL 2207 (204)
B.Ward (130)
Lecture

Minerals.docx

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School
Langara College
Department
Geology
Course
GEOL 2207
Professor
B.Ward
Semester
Summer

Description
Minerals: The building blocks of rocks Definition of a Mineral:  Naturally occurring  Inorganic Solid  Ordered internal molecular structure  Definite chemical composition Definition of a Rock:  Solid aggregate or mass of minerals Rocks, Minerals, and Elements Nearly 4000 minerals have been identified on Earth Rock-forming Minerals  20-30 common minerals make up most of Earth’s crust  8 elements form 98% of continental crust  Silicon (Si) and oxygen (O) are the most abundant Igneous Rocks Rocks are classified based on how they were formed  Distinguished by mineralogy and texture Igneous Rocks: Form from a hot liquid called magma that originates deep in the earth that moves up toward the surface Intrusive – had time to cool, big crystals Extrusive – cools quickly, small crystals Igneous Intrusion
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