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प्रश्न
How are chemically-formed sedimentary rocks formed? Give examples.
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उत्तर
Chemically formed sedimentary rocks are formed through chemical action of water. Some mineral like limestones and salts are dissolved into the water and after the evaporation of water form a particular type of rock which is formed by the chemical sedimentation of limestones into gypsum and salt into various types of nitrates.
संबंधित प्रश्न
Fill in the blank
A category of rock which is formed by the alteration of the parent rock due to heat and pressure is called: ______________.
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Write True or False. Rewrite the false statement correctly :
Minerals are organic substances.
Classify the following rocks by selecting the correct option given below:
marble
Explain the structure of the earth’s interior?
State two characteristics of Basic Igneous Rocks.
Give two examples of sedimentary rocks.
Explain this term associated with rocks: Fossil fuels
State the types of rocks for the formation of which the following process is involved.
Formation of large crystals, coarse texture and slow cooling and compaction.
How are sedimentary rocks classified on the basis of their formation?
Give one word for the following.
Stratified rock formed organically but from vegetative matter-swamps and forests.
Give one word for the following.
The core of the earth occupied by rock in iron and nickel.
How is Plutonic rock formed?
Give reasons for the following
Extrusive rocks generally have small crystals.
Fossils are found in.
Chemical sedimentary rocks are found in the beds of reservoirs.
Out of 2,000 different types, only ______ are the basic minerals commonly found all over the earth.
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.
