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火山岩储层岩石类型主要包括熔岩类、火山碎屑岩类。Rock types of volcanic reservoirs include mainly lava and pyroclastic rock.

火山碎屑流是由火山喷发而引起的最可怕自然灾害。Pyroclastic flows are some of the most fearsome hazards posed by erupting volcanoes.

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向熔岩过渡的火山碎屑岩主要为角砾熔岩和凝灰熔岩等。The pyroclastic rocks which transit to lava mainly have breccia lava and tuff lava etc.

沉火山碎屑岩，包括沉凝灰岩和沉火山角砾岩。Sedimentary pyroclastic rocks are mainly sedimentary tuff and sedimentary volcanic breccia.

群系中火成碎屑物的存在表明了火山酌的形成年代。Periods of volcanism are indicated by the presence of pyroclastic material in the formation.

火山碎屑岩是介于溶岩和沈积岩之间的过渡类型岩石，岩类复杂。Pyroclastic rocks are a kind of transitional and complex rocks between lavas and sedimentary rocks.

火成岩的碎块成分主要为石英岩、片岩、片麻岩、玄武岩、安山岩和流纹岩。The pyroclastic rock fragments comprise quartzite, schist, gneiss, basalt, andesite, rhyolite and quartz.

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每个单元自下而上可分为涌流堆积、碎屑流堆积及灰云堆积。Each unit consists upward of cutpouring flow accumulation, pyroclastic flow accumulation and ash cloud accumulation.

主要论述了这次大爆发的火山喷发碎屑堆积物的层序和分布。The author deals with mainly the sequence and distribution of the pyroclastic deposits of the 800 a. B. P. eruptions.

萨勒布尔提山上志留统克克雄库都克组为一套巨厚的火山碎屑浊积岩。The upper silurian system of the Shaerbuer mountain region of west Jungger is maga-formation of pyroclastic turbidite.

上黑龙江盆地火山岩主要为基性、中酸性的熔岩、火山碎屑岩，可划分5个火山岩带。On Heilongjiang basin volcanic rock mainly for basic, acidic lava, pyroclastic rocks, may divide 5 volcanic rock belts.

在整个村庄遭到火山灰流或熔岩的袭击之前，为了躲避来自火山的有毒气体，人们已经筋疲力尽。Whole towns have been wiped out by poisonous gases from volcanoes even before they were hit with pyroclastic flows or lava.

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巴里坤煤矿北原划下泥盆统塔黑尔巴斯套组下部，发现一套中基性火山岩及火山碎屑岩建造。A set of intermediate basic volcanics, pyroclastic rock and top part of clastic rock is found in north of Balikun coal mine.

笔者对滦平地区火山碎屑流冷却单元进行了深入的研究，划分出12个冷却单元。The author deeply studied cooling unit of pyroclastic flow in Luanping area and divided the volcanic rock into 12 cooling units.

火山碎屑流堆积因其巨大的危害性而成为火山学研究的重要课题之一。This paper demonstrates the results of grain-size sieve analyses of the millennium pyroclastic flow deposits from Tianchi volcano.

含矿岩系为双峰岩石组合，具火山碎屑岩-矿体-喷气岩“三位一体”特征。The ore-bearing beds have a bimodal rock association and exhibit assembly characteristics of pyroclastic rock, orebody and exhalite.

其中对人类生命财产构成严重威胁的火山灾害有熔岩流、火山碎屑流、火山泥流和火山海啸。Lava flows, pyroclastic flows , lahars and volcanic tsunamis are the major hazards that threaten the life and property of the people.

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湘东南汝城盆地火山岩系由辉绿岩、玄武岩和玄武质火山碎屑岩组成，属于低钾拉斑玄武岩系。The volcanic rock series in the Rucheng basin in southeastern Hunan is composed of the basalt, diabase and basaltic pyroclastic rock.

更新世至现代的火山岩为全晶质斑状的橄榄玄武岩和火山碎屑岩。The holocrystalline porphyritic olivine basalts and pyroclastic rocks are the components of Pleistocene to recent volcanic activities.

当岩浆库上方的陆地崩陷，称为火山碎屑流的巨大灰色云雾，会突然由火山臼的周围向外水平散开。As the land above the magma chamber collapses, immense gray clouds called pyroclastic flows burst out horizontally all around the caldera.