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प्रश्न
Name different types of sedimentary rocks.
उत्तर
There are three types of sedimentary rocks on the basis of the nature of sediments, their origin, composition and mode of formation. These are mechanically-formed sedimentary rocks, organically formed sedimentary rocks and chemically- formed sedimentary rocks.
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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: ______________.
Classify the following rocks by selecting the correct option given below:
gneiss
How do acidic igneous rocks differ from basic igneous rocks?
Name the types Sedimentary rocks based on agents of formation.
Explain the formation of sedimentary rocks on the basis of agents of formation.
Classify the following rock: Granite
Classify the following rock: Schist
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.
Give one example of an area of: Igneous rocks
Why are Sedimentary rocks called the Secondary rocks?
Give one term for the following statement:
Rounded or sub-rounded fragments, usually water-born cobbles, pebble and gravel, cemented together by a matrix of calcium carbonate, silica, etc.
Why are the Igneous Rocks called Primary Rocks?
Match the following:
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Distinguish between Metamorphic rock and sedimentary rock.
Match the following:
| (a) | Igneous | (i) | Magma |
| (b) | Sedimentary | (ii) | Transformation |
| (c) | Metamorphic | (iii) | Gypsum |
| (d) | Molten material | (iv) | Basalt |
| (e) | Rock Cycle | (v) | Marble |
Parent Rock is converted to loose Rock by ______.
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.
