第一百三十章 冰封的火山湖(2 / 2)

“火山是大地中常见的地质现象。地壳之下1oo至15o千米处,有一个“液态区”,区内存在着高温、高压下含气体挥成份的熔融状硅酸盐物质,即岩浆。它一旦从地壳薄弱的地段冲出地表,就形成了火山,这种喷出地面的形势,我们一般称其为火山爆。

此外,火山分为“活火山”、“死火山”和“休眠火山”三类。

由于火山出现的历史很悠久。有些火山在人类有史以前数万或数十万年前就喷过,但不再活动,这样的火山称之为“死火山”;而有史以来曾经喷过,但几百甚至上千年长期以来处于相对静止状态的火山,此类火山都保存有完好的火山锥形态,仍然具有火山活动能力,或尚不能断定其已丧失火山喷能力,人们称之为“休眠火山”;人类有史以来,每隔几十甚至上百年时间就偶有喷的火山,称为“活火山”。

火山的爆能喷出多种物质,由于火山的剧烈喷,导致火山口下方深处的岩浆房被掏空,无法支撑上方山体的重力,造成以火山口为中心的部分火山锥体向下塌陷,造成巨大的环形破火山口。接着由于雨水,山顶冰川的融化的雪水,汇集到了火山口中,就聚集成了山顶上的湖泊。这类湖泊被称为火山湖或者火山口湖。

这类湖泊非常有意思。如果火山处于休眠,或者死亡状态,湖水会非常清澈,可以直接做为饮用水使用。比如宏伟屏障中部的巨石峰火山湖,就是包括拉阔尔部落、斯坦帕部落等周围生活族群重要的水源地。

而如果火山体处于半休眠状态,湖底,也就是火山口会释放出各种酸性气体。导致火山湖的湖水呈现强烈的酸性和不同颜色。不过,无论是休眠中的火山还是半休眠的火山,甚至是死火山,只要形成了火山湖后很少会有结冰的现象出现,无论春夏秋冬,火山湖基本都会维持在液体的状态。所以,刚才努努说他见过的那个结冰的火山湖令我感到了有些奇怪,也许,到了那里后,我才能知道准确是什么原因造成的。”

虽然陈寅的讲述中,有很多的专业术语众人不太懂,但是大家仍听得津津有味。安妮一脸崇拜的望着陈寅说道“莫言哥哥,你好厉害啊,你怎么什么都知道啊早知道这样,该让瓦妮莎姐姐和杰克哥哥去捕猎,这几天我就可以让你给我天天讲各种故事了!!”

瓦妮莎本来也是一脸崇拜的看着陈寅,不过被安妮这么打岔的一说,脑门上立刻浮现了三条黑线,随后瓦妮莎双手一把捏住了安妮肉肉的脸蛋,不断拉扯着并狠狠的说道“小安妮,你的意思是说我这几天给你讲的故事让你感觉很没有意思,是这样吗”

安妮在瓦妮莎的威逼之下连连摇头,看着小安妮囧囧的表情,众人笑成了一团。

最终,当大家确认了出的目的地后,由努努和雪人威朗普走在前列,大家跟在后面,向努努所说的那个火山湖方向开始行进。

十几天的跋山涉水和风餐露宿后,众人接近了努努所说的那处火山湖边缘。

陈寅站在一处山脉峰顶,向远方的火山望去,只见此山体巍峨宏伟,山口处白雪皑皑,山顶处的云朵如层层薄纱将峰尖笼罩,令陈寅忽然记起了一诗词,此刻用来形容眼前这座壮观的火山最贴切不过。

于是,陈寅感慨的念了出来“仙客来游云外巅,神龙栖老洞中渊。雪如纨素烟如柄,白扇倒悬东海天。”

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