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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
Fill in the blank
Sedimentary rocks are formed from _____________ accumulated over long periods.
Classify the following rocks by selecting the correct option given below:
granite
Give one difference between Extrusive igneous and Intrusive igneous rocks.
State two characteristics of Basic Igneous Rocks.
Briefly define Mechanical Metamorphism.
Distinguish between the following:
Sills and Dykes.
Distinguish between Regional and Contact metamorphism.
Give some examples of metamorphic rocks formed from sedimentary and igneous rocks.
Classify the following rock: Slate
Classify the following rock: Graphite
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
Give one word for the following.
Igneous rocks, which contain a high percentage of silica.
Why are the Igneous Rocks called Primary Rocks?
How is sand that flows in a river formed? Collect some information about where the sand comes from.
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
This is the storehouse of rocks.
______ are chemical substances which exist in nature.
The world Igneous is derived from the Latin word ______ meaning ______.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
