The correct chronological order of following geological structures in India is :

Question

Accepted Answer

The correct chronological order of the geological structures in India is given as Option 4: Dharwar-Cudappah-Vindhyan-Gondwana. Let's explore why this is the correct order and why the other options are incorrect.

### Explanation for Option 4:

1. **Dharwar (Archean Era):**
   - The Dharwar system is one of the oldest geological formations in India, dating back to the Archean era, which is over 2.5 billion years ago. These rocks are primarily found in the southern part of India, particularly in Karnataka. They are known for their rich mineral deposits, including gold and iron.

2. **Cudappah (Proterozoic Era):**
   - Following the Dharwar system, the Cudappah system belongs to the Proterozoic era, which ranges from about 2.5 billion to 541 million years ago. The Cudappah basin is located in the southeastern part of India and is characterized by sedimentary rocks. This system is younger than the Dharwar and represents a significant geological period in India's history.

3. **Vindhyan (Late Proterozoic to Early Paleozoic Era):**
   - The Vindhyan system is younger than the Cudappah and dates from the late Proterozoic to the early Paleozoic era, approximately 1.6 billion to 541 million years ago. The Vindhyan range is primarily located in central India and is known for its extensive sedimentary rock formations.

4. **Gondwana (Paleozoic to Mesozoic Era):**
   - The Gondwana system is the youngest among these formations, spanning from the late Paleozoic to the Mesozoic era, roughly 541 million to 66 million years ago. It is named after the ancient supercontinent Gondwana and is significant for its coal deposits. The Gondwana rocks are found in central and eastern India.

### Why Other Options are Incorrect:

1. **Option 1: Cudappah-Dharwar-Gondwana-Vindhyan**
   - This option incorrectly places Cudappah before Dharwar. The Dharwar system is older than the Cudappah system, making this sequence incorrect.

2. **Option 2: Dharwar-Cudappah-Gondwana-Vindhyan**
   - This option incorrectly places Gondwana before Vindhyan. The Vindhyan system is older than the Gondwana system, so this sequence is not accurate.

3. **Option 3: Vindhyan-Gondwana-Dharwar-Cudappah**
   - This option is incorrect because it places the Vindhyan and Gondwana systems before the Dharwar and Cudappah systems. The Dharwar system is the oldest, followed by Cudappah, making this sequence incorrect.

In conclusion, Option 4 correctly represents the chronological order of these geological structures in India, starting with the oldest, Dharwar, and ending with the youngest, Gondwana.