Fossils of Archaeopteryx were found from

Options

A. Jurassic rocks
B. Triassic rocks
C. Cretaceous rocks
D. Cenozoic rocks

Answer

**Step-by-Step Solution:**

1. **Understanding Archaeopteryx**: Archaeopteryx is known as a transitional fossil, often considered the first bird. It serves as a connecting link between reptiles (specifically predatory dinosaurs) and modern birds.

2. **Identifying the Geological Era**: To determine where the fossils of Archaeopteryx were found, we need to look at the geological eras. The Phanerozoic Eon is divided into three main eras: Paleozoic, Mesozoic, and Cenozoic.

3. **Breaking Down the Mesozoic Era**: The Mesozoic Era is further divided into three periods:
- Triassic Period
- Jurassic Period
- Cretaceous Period

4. **Locating Archaeopteryx's Existence**: Archaeopteryx lived during the Mesozoic Era, specifically in the Jurassic Period. However, its fossils are primarily found in the rocks from the Cretaceous Period.

5. **Eliminating Incorrect Options**:
- **Triassic Rocks**: This period is earlier than the Jurassic, so it is not correct.
- **Jurassic Rocks**: While Archaeopteryx lived during this period, the fossils are not primarily found in these rocks.
- **Cenozoic Rocks**: This era is much later than the Mesozoic Era, so it cannot contain Archaeopteryx fossils.

6. **Conclusion**: The correct answer is that the fossils of Archaeopteryx were found in the **Cretaceous rocks**.

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