What is the correct chronological sequence of the following ‘periods’

What is the correct chronological sequence of the following ‘periods’ in the Earth’s geological timescale?

  • 1. Cambrian
  • 2. Carboniferous
  • 3. Cretaceous
  • 4. Devonian

Select the correct answer using the code given below.

1-4-2-3
1-2-4-3
1-2-3-4
2-1-3-4
This question was previously asked in
UPSC CBI DSP LDCE – 2023
The correct option is A.
The geological timescale periods mentioned belong to the Phanerozoic Eon. Their correct chronological order from oldest to youngest is:
1. **Cambrian** (Paleozoic Era, starting ~541 million years ago)
2. **Devonian** (Paleozoic Era, ~419 – 359 million years ago)
3. **Carboniferous** (Paleozoic Era, ~359 – 299 million years ago)
4. **Cretaceous** (Mesozoic Era, ~145 – 66 million years ago)
The Paleozoic Era follows the Precambrian and precedes the Mesozoic Era. The order of periods within the Paleozoic is Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian. The Mesozoic Era consists of the Triassic, Jurassic, and Cretaceous periods.
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