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प्रश्न
Distinguish between the following:
Calcarious and Carbonacious rocks.
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उत्तर
| Calcarious rocks | Carbonacious rocks |
| The sedimentary rocks formed by the deposition of shells and skeletons of sea organisms, such as corals, clams, oysters, etc., are called calcareous rocks due to the excess of calcium. | The sedimentary rocks formed by the deposition of large-scale vegetation and animals, etc., are called carbonaceous rocks due to the excess of carbon. |
| Formed mainly from calcium carbonate. | Formed mainly from carbon-rich plant remains. |
| Made from shells and skeletons of marine organisms. | Made from accumulated, compacted plant material. |
| Examples: Limestone, Chalk. | Examples: Peat, Lignite, Bituminous coal, Anthracite. |
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संबंधित प्रश्न
Fill in the blank
Conglomerate is an example of _____________ rocks.
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Give an example of intrusive igneous rock.
Classify the following rocks by selecting the correct option given below:
Gneiss
Name two important landforms made by Igneous Rocks.
State the types of rocks for the formation of which the following process is involved.
Accumulation takes place over long periods of time in seas, lakes and streams.
What is meant by a rock?
Distinguish between Thermal metamorphism and Dynamic metamorphism.
Classify the following rock: Quartzite
Give one word for the following.
A sedimentary rock, which is composed of microscopically fine, soft and smooth particles.
Give one term for the following statement:
Fine grained metamorphic rock, generally produced by the low grade metamorphism of shale.
Give an example of a Plutonic rock.
Give reasons for the following
Man’s habitat is the biosphere and not the lithosphere in the true sense.
Volcanic mountains are covered with sedimentary rocks.
Diamond is an example of _______ rock.
Minerals exist in nature ¡n the form of ______ or ______.
Sedimentary rocks are called stratified rocks.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
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.
