Objectives of the Lecture:
3. Igneous Rocks: Igneous rock got their name from the Latin word "Ignis" which stands for fire. Igneous rocks are those rocks formed by the solidification of the magma or lava. These are generally of two types: Intrusive and Extrusive.
Intrusive Igneous Rocks are formed from the trapped magma that cools down and solidified within the crust of the planet. Intrusive rock cools very slowly, as a result, these rocks are coarse-grained.
Example of the Intrusive Igneous Rocks includes: Granite, Diorite etc.
Extrusive Igneous Rocks are formed from the cooling and solidification of the molten lava, which used to form above the earth's crust. Extrusive rock cools much faster as compared to intrusive and as a result, these rocks are fine-grained.
Example of the Extrusive Igneous Rocks includes: Basalt, Pumice etc.
LECTURE RELATED QUESTIONS:
1. Classify the types of rocks and briefly describe each of them.
2. What is Metamorphic Rock? Give few example of metamorphic rock.
3. What is Sedimentary Rock? Give few example of sedimentary rock.
4. What is Igneous Rock? Give few example of igneous rock.
5. Classify the types of Igneous rock and briefly describe each of them with example.
- Types of Rocks
- Sedimentary Rocks
- Metamorphic Rocks
- Igneous Rocks
Natural occurring rocks are too dense, massive and strong, as because of such reasons, from last many decades these are being used in construction of structures. Rocks, basically are of three types:
1. Sedimentary Rocks: Sedimentary Rocks are those rocks which are formed by the accumulation of sediments within the glaciers, rivers, oceans etc. These sediments were bonded beneath the soil from last so many of years, resulting formation of sedimentary rock bed.
Example of the Sedimentary rock includes: Chalk, Limestone, Sandstone etc.
Example of the Sedimentary rock includes: Chalk, Limestone, Sandstone etc.
2. Metamorphic Rocks: Metamorphic rocks are those rocks formed by the transformation of the pre-existing rock, subjected to very high heat and pressure, resulting in the physical as well as chemical change in the nature of rock.
Example of the Metamorphic rock includes: Slate, Marble etc.
3. Igneous Rocks: Igneous rock got their name from the Latin word "Ignis" which stands for fire. Igneous rocks are those rocks formed by the solidification of the magma or lava. These are generally of two types: Intrusive and Extrusive.
Intrusive Igneous Rocks are formed from the trapped magma that cools down and solidified within the crust of the planet. Intrusive rock cools very slowly, as a result, these rocks are coarse-grained.
Example of the Intrusive Igneous Rocks includes: Granite, Diorite etc.
Extrusive Igneous Rocks are formed from the cooling and solidification of the molten lava, which used to form above the earth's crust. Extrusive rock cools much faster as compared to intrusive and as a result, these rocks are fine-grained.
Example of the Extrusive Igneous Rocks includes: Basalt, Pumice etc.
LECTURE RELATED QUESTIONS:
1. Classify the types of rocks and briefly describe each of them.
2. What is Metamorphic Rock? Give few example of metamorphic rock.
3. What is Sedimentary Rock? Give few example of sedimentary rock.
4. What is Igneous Rock? Give few example of igneous rock.
5. Classify the types of Igneous rock and briefly describe each of them with example.
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