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प्रश्न
Why fossils are preserved in Sedimentary and not in Igneous rocks?
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उत्तर
Fossils are remains of vegetation and animals buried under the sediments. The sedimentary rocks are stratified rocks and are found in layers. These fossils are preserved in between these layers. But in Igneous rocks, the fossils are destroyed due to high temperature of lava.
संबंधित प्रश्न
Write True or False. Rewrite the false statement correctly :
Minerals are organic substances.
Classify the following rocks by selecting the correct option given below:
granite
Which rocks are associated with ores of metals?
Name the three stages of lithification of Sedimentary rocks.
Distinguish between the following:
Thermal and Dynamic Metamorphism.
Classify the following rock: Shale
Classify the following rock: Loess
Classify the following rock: Graphite
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.
Igneous rocks, which contain a high percentage of silica.
Give one word for the following.
Igneous rocks, which contain a low percentage of silica.
Fill in the blanks
Extrusive rocks are also known as ______ rocks.
State the properties of metamorphic rocks.
Diamond is an example of _______ rock.
Mention a few specimens of magnificent rock-cut architecture in India?
How are igneous rocks formed?
Distinguish between:
Internal Processes and External processes.
Explain Dynamic Metamorphism.
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 |
