Problem: Are pyroclastic materials a significant component of shield volcanoes? View Available Hint(s)for Part A No; during the final stage of shield volcano formation, eruptions become less sporadic, resulting in fewer pyroclastic materials being ejected. Yes; pyroclastic materials are more commonly ejected during the final stage of growth of a shield volcano, when eruptions become less sporadic. Yes; pyroclastic materials are more commonly ejected during the first stage of growth of shield volcanoes, thus forming a foundation for the volcano. No; pyroclastic materials are never ejected from shield volcanoes. Yes; pyroclastic materials are more commonly ejected during the final stage of growth of a shield volcano, when eruptions become more sporadic. Need Assignment Help?