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Transcript 
Hawai’i Minerals and Rocks
The Composition of the Hawai’i
Topics
• Silicates
• Other Common Minerals
• Rocks
• Igneous Rocks
Topics
• Silicates
• Other Common Minerals
• Rocks
• Igneous Rocks
Hawai’i Rocks
Igneous, Metamorphic, and Sedimentary
Definintion
Definintion
Rock - an aggregate of minerals
Definintion
Rock - an aggregate of minerals
Rocks can be composed of many minerals or
only one mineral
Rock Classifications
Rock Classifications
Three types of rocks:
Rock Classifications
Three types of rocks:
1. Igneous
Rock Classifications
Three types of rocks:
1. Igneous
2. Sedimentary
Rock Classifications
Three types of rocks:
1. Igneous
2. Sedimentary
3. Metamorphic
Igneous Rocks
Igneous rocks form by the cooling and
crystallization of magma
Granite
Granite
Sedimentary Rocks
Sedimentary rocks form from materials that are
weathered and eroded from other rocks
Sedimentary Rocks
Limestone
Sandstone
Cobblestone
Metamorphic Rocks
Metamorphic rocks form from the mineralogical
and textural reordering of other rocks, when
rocks are exposed to high T or P
Metamorphic Rocks
Hawai’i Rocks
Igneous rocks are the most common type of
rocks in Hawai’i
See only minor occurrences of sedimentary or
metamorphic rocks
Most sedimentary rock forms near the coastline
Three Types of Rock
Next
Igneous Rocks
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