Table of contents |
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Rocks |
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Types of Rocks |
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Rock Cycle |
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Economic Importance of Rocks |
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Ever wondered what lies beneath the Earth's surface? The chapter "Rocks" in ICSE Class 9 Geography takes you on an exciting journey to explore the solid foundation of our planet. Rocks are not just lifeless stones; they are the storytellers of Earth's history, holding clues to ancient environments and processes. From fiery igneous rocks born from molten magma to layered sedimentary rocks preserving fossils, and metamorphic rocks transformed by heat and pressure, this chapter unveils the fascinating world of rocks and their role in shaping the Earth's crust. Get ready to discover how rocks cycle through time and their importance in our lives!
Characteristics:
Types of Igneous Rocks:
Extrusive Igneous Rocks:
Intrusive Igneous Rocks:
Types include:
Classification Based on Chemical Composition:
Characteristics:
Classification of Sedimentary Rocks:
Based on Processes:
Based on Formation:
Based on the Agent of Formation:
Marine Rocks:
Types of Metamorphism:
Processes of Metamorphism:
Example of Metamorphism: When limestone, a sedimentary rock, is subjected to high heat and pressure, it transforms into marble, a metamorphic rock. This process, called recrystallization, changes the mineral structure, making marble harder and more crystalline, often used in sculptures and buildings.
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