Advertisements
Advertisements
प्रश्न
State the chief characteristics of metamorphic rocks.
Advertisements
उत्तर
-
They are harder and more compact than their original form.
-
Most of them are impermeable; they do not allow water to percolate through them.
-
They do not have fossils because fossils in sedimentary rocks are destroyed during metamorphism.
-
They are formed due to a change in texture and composition of pre-existing rocks.
-
New minerals are formed during the process of metamorphism.
APPEARS IN
संबंधित प्रश्न
Classify the following rocks by selecting the correct option given below:
marble
How are sedimentary rocks formed?
What is sills?
Give two examples of sedimentary rocks.
What processes are involved in the formation of Igneous Rocks?
How are chemically-formed sedimentary rocks produced?
Distinguish between Thermal metamorphism and Dynamic metamorphism.
Classify the following rock: Coal
Classify the following rock: Dolomite
Give one word for the following.
Igneous rocks, which contain a low percentage of silica.
Fill in the blanks
______ is formed, when the angular and coarse grains of some durable minerals are cemented together.
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.
Give an example of a Plutonic rock.
This is the storehouse of rocks.
The word ‘Igneous’ is derived from the ______ word.
Distinguish between:
Internal Processes and External processes.
Explain the type of Igneous Rocks.
Intrusive Igneous rocks are also called ______ rocks.
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
Match the following.
| A. | Granite | 1. | Bed rock |
| B. | Soil layer | 2. | Plutonic rock |
| C. |
Barren island |
3. | Strip farming |
| D. | Soil conservation | 4. | Active Volcano |
