Pyroclastic flows in the context of "Plymouth, Montserrat"

A pyroclastic fall deposit is a uniform deposit of material which has been ejected from a volcanic eruption or plume such as an ash fall or tuff. Pyroclastic fallout deposits are a result of:

1. Ballistic transport of ejecta such as volcanic blocks, volcanic bombs and lapilli from volcanic explosions
2. Deposition of material from convective clouds associated with pyroclastic flows such as coignimbrite falls
3. Ejecta carried in gas streaming from a vent. The material under the action of gravity will settle out from an eruption plume or eruption column
4. Ejecta settling from an eruptive plume or eruption column that is displaced laterally by wind currents and is dispersed over great distances

The Miravalles Volcano is an andesitic stratovolcano in Costa Rica. The caldera was formed during several major explosive eruptions that produced voluminous dacitic-rhyolitic pyroclastic flows between about 1.5 and 0.6 million years ago. The only reported historical eruptive activity was a small steam explosion on the south-western flank in 1946. High heat flow remains, and Miravalles is the site of the largest developed geothermal field in Costa Rica.

The Miravalles Volcano reaches an elevation of 2,023 metres (6,637 ft) and is the highest mountain in the Guanacaste Mountains. The heat from the volcano also helps power a geothermal energy plant at Las Hornillas, which is run by the Institute of Electricity.

Mount Scenery (pronounced like the word 'scenery') is a dormant volcano in the Caribbean Netherlands. Its lava dome forms the summit of the Saba island stratovolcano. At an elevation of 870 m (2,854 ft), it is the highest point in both the Kingdom of the Netherlands, and, since the dissolution of the Netherlands Antilles on 10 October 2010, the highest point in the Netherlands proper.

The Saba volcano is potentially dangerous. It is currently classified as "dormant", which means it is an active volcano that is not erupting now, but could erupt in the future. The last eruption was in or around the year 1640 and included explosions and pyroclastic flows. The most recent major eruption was at least 5,000 years ago. According to the U.S. Global Volcanism Program, Saba's volcano is the northernmost active volcano in the Caribbean.