Which one of the following is formed when volcanic ash is carried by running water and is deposited as a sedimentary layer?

  1. A. Basalt
  2. B. Lapilli
  3. C. Slate
  4. D. Tuff

Correct Answer: D. Tuff

Explanation

Tuff is a type of rock consisting of consolidated volcanic ash ejected from vents during a volcanic eruption, which can be transported by water and deposited as sedimentary layers.

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