The correct size order of pyroclastic material (from smallest to largest) is
A) bomb; lapilli, ash.
B) lapilli; ash; bomb.
C) bomb; ash; lapilli.
D) ash; lapilli; bomb.

Question

Quizplus · Accepted Answer

The correct order of pyroclastic material from smallest to largest is ash, lapilli, and then bombs. Ash is the smallest size with particles less than 2 mm in diameter, followed by lapilli which are between 2 mm and 64 mm in diameter, and bombs which are greater than 64 mm in diameter. Therefore, option D (ash; lapilli; bomb) is the correct size order.

The Correct Size Order of Pyroclastic Material (From Smallest to Largest)