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प्रश्न
What is sills?
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उत्तर
Sills are horizontal intrusions of magma that have forced their way between layers of existing rock and solidified there. Unlike dykes, which cut vertically across rock layers, sills lie parallel to the bedding planes. When the magma cools and hardens in these horizontal cracks, it forms a flat, sheet-like body of igneous rock.
संबंधित प्रश्न
What is crust?
Differentiate between SIAL and SIMA.
Classify the following rocks by selecting the correct option given below:
granite
Classify the following rocks by selecting the correct option given below:
gypsum
Describe how igneous rocks are formed.
Classify the following rock: Clay
Classify the following rock: Dolomite
Classify the following rock: Slate
Classify the following rock: Marble
Give one word for the following.
Rocks formed by the cooling and solidification of molten rock from beneath the earth crust.
Give one word for the following.
The upper part of lithosphere, which is rich in silica and aluminium.
Fill in the blanks
______ is the best example of the wind deposited stratified rock.
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
How are igneous rocks formed?
Rocks are classified into ______ types.
The two types of Intrusive Igneous rocks are ______.
Parent Rock is converted to loose Rock by ______.
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
Mention some uses of rocks.
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
