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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
Rocks and minerals play a very important role in our lives.
Can you imagine modern life without minerals?
Differentiate between SIAL and SIMA.
State two characteristics of Basic Igneous Rocks.
Name the types Sedimentary rocks based on agents of formation.
Explain this term associated with rocks: Metamorphism
Classify the following rock: Gypsum
Classify the following rock: Loess
Classify the following rock: Quartzite
Give one term for the following statement:
Igneous rocks of deep seated origin.
Give one term for the following statement:
Type of metamorphism in which changes are caused due to high pressure.
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.
______ into slate caused by thermal metamorphism.
Parent Rock is converted to loose Rock by ______.
Sedimentary rocks are called stratified rocks.
Mention some uses of rocks.
Explain the different types of sedimentary rocks.
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 |
