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प्रश्न
How are sedimentary rocks classified on the basis of their formation?
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उत्तर
There are three types of this type of rocks :
- Mechanically formed rocks : Denudation of rocks by agents of change results in layers of sedimentary rocks by mechanism.
- Chemically formed rocks : These are formed by evaporation of calcarious water and accumulated along lake and lagoon beds, e.g. gypsum and rock salt.
- Organically formed rocks : These are formed by deposition of dead plants and animals e.g. limestone rock (or Calcareous rock) lignite, bituminous and anthracite coal are carbonaceous rocks formed by compression of vegetation under the layers of sedimentary rocks. In the same way petroleum in between the sedimentary rocks is the result of zurasic age dinosaurs e.g. shale rock, containing oil.
संबंधित प्रश्न
Why is diamond clear and hard while graphite is soft?
Classify the following rocks by selecting the correct option given below:
Gneiss
Classify the following rocks by selecting the correct option given below:
gypsum
How are igneous rocks formed?
How do acidic igneous rocks differ from basic igneous rocks?
The photograph shows you a type of rock that is widely used in the construction industry.
- Name the type of rock.
- How is it formed?
What processes are involved in the formation of Igneous Rocks?
How are igneous rocks classified on the basis of their chemical composition?
How are sedimentary and igneous rocks formed?
Fill in the blanks
______ rock contain a low percentage of silica and a high percentage of basic oxides.
How are sedimentary rocks classified?
Give one term for the following statement:
Igneous rocks of deep seated origin.
Why fossils are preserved in Sedimentary and not in Igneous rocks?
Give reasons for the following
Silicates are the most common rock forming minerals.
Classify and explain the rocks.
______ into slate caused by thermal metamorphism.
______ rocks are also called Primary rocks.
The world Igneous is derived from the Latin word ______ meaning ______.
