21. The upper white unit is a thick pyroclastic flow from Archibarca. 22. It is constructed by dacite and surrounded by pyroclastic flow deposits. 23. Pyroclastic flows and mudflows were deposited on the lower slopes of the cone simultaneously.24. It is a pyroclastic flow that extended westward and contained breccia and various magmas. 25. During the Holocene, Yucamane has shown signs of Plinian eruptions which produced pyroclastic flows . 26. This eruption formed many pyroclastic flows and produced a dome which filled the caldera. 27. The old airport and the capital, Plymouth, were destroyed in pyroclastic flows in 1997. 28. The deposits of pumice-rich pyroclastic flows can be called ignimbrites. 29. Nineteen people were killed when pyroclastic flows cascaded down from the volcano in 1997. 30. An older unit is formed by ignimbrites and pyroclastic flows .
