Advertisements
Advertisements
प्रश्न
Give a detailed account of lithiflcation of sedimentary rocks.
उत्तर
Lithification means solidification. The loose material carried on by water, wind and ice is deposited slowly in different layers one upon another. Gradually the deposited sediments become solid and hard due to pressure and temperature. Evaporation results in the loss of water within the sediments and these are compacted and cemented. Compaction takes place by increasing weight and pressure of over lying sediments e.g. sand is converted to sandstone. Cementation takes place by bonding of compacted sediments by natural elements like calcium compounds, silica and iron with a property to bind the loose materials to solid state.
APPEARS IN
संबंधित प्रश्न
What is crust?
Classify the following rocks by selecting the correct option given below:
coal
Classify the following rocks by selecting the correct option given below:
marble
Classify the following rocks by selecting the correct option given below:
basalt
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?
Sedimentary rocks are also called stratified rocks. Why?
Classify the following rock: Schist
Give one word for the following.
The lower part of ocean floor, comprising mainly of silica.
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.
The best example of chemically-formed sedimentary rock, which has been formed by the evaporation of water from solution containing minerals.
State the properties of metamorphic rocks.
Give one term for the following statement:
Formed when mud layers compacted under great pressure composing 80% of this rock.
Which one of the following is the most widespread most and productive category of soil.
______ is the kind of metamorphic rock using which Taj Mahal was built.
Chemical sedimentary rocks are found in the beds of reservoirs.
Oldest Sedimentary rocks of the world has been identified in Green land.
Explain the different types of sedimentary rocks.
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 |
