| Major valleys cutting the volcano's flanks have been partly or completely filled in by pyroclastic flow deposits and lahars. |
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| The pyroclastic deposits mainly consist of block-and-ash, blast, tephra fallout and secondary pyroclastic flow deposits. |
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| The tracks are impressed on a volcanic pyroclastic flow deposit and buried under volcanic ash. |
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| Risk is an indication of the possible impact of a particular hazard, a lava flow or pyroclastic flow for example. |
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| Secondary pyroclastic flow deposits are locally exposed, generally infilling palaeochannels with no lateral continuity, and commonly overlying blast deposits. |
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| The fluid nature of a pyroclastic flow is maintained by the turbulence of its internal gases. |
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| The eruption sent a pyroclastic flow of superheated gases and debris racing down Merapi's slopes. |
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| The pyroclastic zone, also known as the pyroclastic flow, was created where hot pumice poured out of the volcano, sterilizing the earth. |
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| It claims its massive investment in grassroots outreach will shield it against the expected pyroclastic flow of negative advertising. |
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| Once a pyroclastic flow runs out of momentum, the material that makes it up settles to the ground to form a sinuous deposit of ash and blocks. |
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| The surge originated when a dense pyroclastic flow shed from the growing lava dome flowed down the volcano flank to the sea. |
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| My love is a pyroclastic flow that burns in every cathedral and every forest for christs and guerrillas in every plaza full of agitation. |
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| In less than twenty seconds, the magma erupted in the form of a pyroclastic flow. |
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| In the eruption of Nov. 22, 1994, the release of a pyroclastic flow killed 64 people. |
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| A pyroclastic flow can interact with a body of water to form a large amount of mud, which can then continue to flow downhill as a lahar. |
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| The meteorologists also reported that a pyroclastic flow of heated gas and rock flowed down the western side of the volcano, reaching the ocean. |
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| In burning slabs like pyroclastic flow the top of the tower slewed off, militia pods falling out and tumbling. |
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| The last time that a volcanic eruption killed people in Japan was in 1991 when 43 died from pyroclastic flow from Mount Unzen in Nagasaki Prefecture. |
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| On 25 June 1997, a pyroclastic flow travelled down Mosquito Ghaut. |
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| Television pictures showed the after-effects of the pyroclastic flow, which had cascaded down the mountainside towards one of the island's harbours. |
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| And based on what we have seen since yesterday afternoon, there are pyroclastic flows and we have no way of knowing which channel the next pyroclastic flow will follow. |
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| After reconstruction, it was clear that the top part of this wall had succumbed to the blast of the pyroclastic flow in AD 79, displacing fragments of its upper zone. |
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