The greatest dangers of pyroclastic avalanches are probably heat and suffocation . 火成碎屑崩落的最大危害可能是熾熱和窒息作用。
Pyroclastic rocks pyroclasts 火山碎屑巖
Pyroclastic rocks are a kind of transitional and complex rocks between lavas and sedimentary rocks 摘要火山碎屑巖是介于溶巖和沈積巖之間的過渡類型巖石,巖類復雜。
As bad as the pyroclastic flows are , the ash injected into the atmosphere can have even more far - reaching consequences 如同火山碎屑流般兇惡,噴發進入大氣層的火山灰甚至會造成更深遠的影響。
Despite of this , the field geology and the character of pyroclastic rocks remain the basis of the petrogenesis of pyroclasic rocks 盡管這樣,野外地質和火山碎屑巖的巖性特徵,仍是火山碎屑巖成因研究的基礎。
As the land above the magma chamber collapses , immense gray clouds called pyroclastic flows burst out horizontally all around the caldera 當巖漿庫上方的陸地崩陷,稱為火山碎屑流的巨大灰色云霧,會突然由火山臼的周圍向外水平散開。
On the basis of the past schemes , new classifications of pyroclasts and the petrographic as well as the petrogenetic classification of pyroclastic rocks are proposed in this paper 中國學者提出的火山碎屑巖分類時間較早,有自己特色,在一定的范圍得到了應用。
Pe trologists , both at home and abroad have spent a lot of time on the classification of pyroclastic rocks , and successively put forward the classification of pyroclasts , the petrographic and the petrogenetic classification of pyroclasic rocks 長期以來,火山碎屑巖的分類研究受到了國內外學者的重視,先后提出了火山碎屑物、火山碎屑巖巖性和火山碎屑巖成因分類。
The lithology of c petrofabric is marble , accidental gneiss . by field attitude , rock association character , petrography and petrochemistry , we know that the protolith of a petrofabric is mainly composed of pelite , sandstone and basic to acidic volcanic , that of b petrofabric mainly a suite of pelite , sandstone ( maybe include volcanic ) , and that of c petrofabric mainly limestone , impurity limestone , a few of pelite and pyroclastic rock A巖組的巖性主要是各種角閃巖類和片麻巖類夾有片巖,偶有變粒巖、大理巖。 b巖組的巖性主要是各種片巖夾有大理巖、石英巖。 c巖組主要是一套大理巖,偶有片麻巖。