The eruption, emplacement and characteristics of extremely large volume pyroclastic flow deposits (ignimbrites).

火山碎屑流是炎热、湍急的火山气体、浮石、岩石碎屑和细灰的流动，通常在主要的火山爆发期间产生。大多数历史事件和研究事件大多是小卷的例子。在这项研究中，我们计划研究南美洲安第斯山脉3个极大体积(&gt；1000 km~3)火山碎屑流沉积的特征，以了解如此大体积和潜在远流动(距喷口200公里)的火山碎屑流的喷发起源和流动动力学。这些可能比印度洋海啸事件更具破坏性，印度尼西亚、巴布亚新几内亚和新西兰可能会发生这种规模的喷发。

Pyroclastic flows are hot, turbulent, flows of volcanic gas, pumice, rock debris and fine ash often produced during major explosive volcanic eruptions. Most historic and researched events have been mostly small volume examples. In this research we propose to investigate the characteristics of 3 extremely large volume (>1,000 km3) pyroclastic flow deposits in the Andes of South America, to understand the eruption origins and the flow dynamics of such large volume and potentially far flowing (up to 200 km from the vent) pyroclastic flows. These are potentially more destructive than the Indian Ocean tsunami event, and eruptions of this magnitude could occur in Indonesia, PNG and New Zealand.