Match List-I with List-II and select the correct answer using the code given below the Lists : List-I (Lake) List-II (Type of Lake) A. Bhimtal 1. Lagoon B. Ashtamudi 2. Landslide C. Gohna 3. Tectonic D. Lonar 4. Crater
A-3, B-1, C-2, D-4
Understanding Lake Types and Their Formation
This question asks us to match different lakes in India with the type of geological or geographical process that led to their formation. Identifying the characteristics and origins of these lakes is key to finding the correct match.
Let's examine each lake listed and its type of formation:
- Bhimtal Lake: Located in the Kumaon region of Uttarakhand, Bhimtal is a large lake situated in a valley. Many lakes in this region are believed to have formed due to tectonic activity, which involves the movement and deformation of the Earth's crust. These movements can create depressions that fill with water. Therefore, Bhimtal is a Tectonic lake.
- Ashtamudi Lake: Situated in Kerala, Ashtamudi is known for its extensive backwaters, which are shallow inlets or bays connected to a larger body of water but separated by a barrier like a sandbar or reef. These are classic examples of Lagoons. Ashtamudi is a major wetland and part of India's network of backwaters (locally called 'kayals').
- Gohna Lake: This lake, also in Uttarakhand, was formed in the late 19th century when a massive landslide blocked the flow of a stream. The accumulated debris created a natural dam, behind which water collected, forming the lake. This type of lake, created by a landslide blocking a valley or river, is classified as a Landslide lake.
- Lonar Lake: Located in Maharashtra, Lonar Lake is unique as it is a saline soda lake formed in a depression created by a meteorite impact event. The circular shape and geological evidence point to an extraterrestrial origin. Lakes formed by meteorite impacts or volcanic craters are known as Crater lakes.
Based on this analysis, we can create the following pairings:
- Bhimtal is a Tectonic lake.
- Ashtamudi is a Lagoon.
- Gohna is a Landslide lake.
- Lonar is a Crater lake.
Let's represent this matching in a table:
| List-I (Lake) | List-II (Type of Lake) | Matching |
|---|---|---|
| A. Bhimtal | 1. Lagoon | A - Tectonic (3) |
| B. Ashtamudi | 2. Landslide | B - Lagoon (1) |
| C. Gohna | 3. Tectonic | C - Landslide (2) |
| D. Lonar | 4. Crater | D - Crater (4) |
The correct matching is A-3, B-1, C-2, D-4.
Revision Table: Key Indian Lakes and Types
| Lake | State | Type of Formation | Key Characteristic |
|---|---|---|---|
| Bhimtal | Uttarakhand | Tectonic | Formed by Earth's crust movements |
| Ashtamudi | Kerala | Lagoon (Backwater) | Coastal lake separated from sea |
| Gohna | Uttarakhand | Landslide | Formed by blockage from a landslide |
| Lonar | Maharashtra | Crater (Impact) | Formed by meteorite impact |
Additional Information: Types of Lake Formation
Lakes are inland bodies of water. They can be formed by various natural processes over geological time. Understanding these processes helps classify different types of lakes:
- Tectonic Lakes: These are formed in depressions created by the movement of the Earth's tectonic plates. Examples include rift valley lakes (like Lake Tanganyika) or lakes formed in fault zones or synclines.
- Lagoons: These are coastal lakes or shallow bodies of water separated from a larger body of water (usually the sea) by a natural barrier like a sandbar, barrier island, or coral reef. They are often brackish or saline.
- Landslide Lakes: These lakes form when a mass of rock or soil slides down a slope and blocks a river or valley, creating a natural dam behind which water accumulates. Their size and duration depend on the stability of the landslide dam.
- Crater Lakes: These lakes form in volcanic craters, calderas, or maars after volcanic activity ceases. They can also form in impact craters created by meteorites, like Lonar Lake.
- Glacial Lakes: Formed by the action of glaciers. This includes cirque lakes (tarns), paternoster lakes, kettle lakes, and moraine-dammed lakes.
- Fluvial Lakes: Formed by river action, such as oxbow lakes created when a meander of a river is cut off from the main channel.
- Karst Lakes: Formed in regions with soluble bedrock (like limestone) where dissolution creates depressions (sinkholes) that fill with water.
Each type of lake provides insights into the geological and geomorphological history of a region.
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