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प्रश्न
Mention any two chief characteristics of Sedimentary Rocks.
उत्तर
- Sedimentary rocks are formed from material derived from other rocks including plant and animal remains. These rocks thus contain fossils.
- Sedimentary rocks are generally not crystalline. They are soft and layered as they are formed by deposition of sediments.
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संबंधित प्रश्न
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Give an example of intrusive igneous rock.
Distinguish between the following: Plutonic and Volcanic rocks.
How are igneous rocks classified on the basis of their chemical composition?
Give one word for the following.
The outer layer of the earth.
Give one word for the following.
The lower part of ocean floor, comprising mainly of silica.
Give one word for the following.
Stratified rock formed organically but from vegetative matter-swamps and forests.
Fill in the blanks
Extrusive rocks are also known as ______ rocks.
Fill in the blanks
______ rocks cover wide area in Peninsular India and Columbia, the Snake Plateau of the U.S.A.
Why are Sedimentary rocks called the Secondary rocks?
Give one term for the following statement:
Rounded or sub-rounded fragments, usually water-born cobbles, pebble and gravel, cemented together by a matrix of calcium carbonate, silica, etc.
Diamond is an example of _______ rock.
Mention a few specimens of magnificent rock-cut architecture in India?
An aggregate of minerals on the Earth’s Crust is called ______.
______ are chemical substances which exist in nature.
Why are crystalline rocks called so?
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Statement (1): Sedimentary rocks consist of many layers.
Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.
