绳状熔岩
2014-03-05 00:00:00
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<span style="line-height:2;font-family:SimSun;font-size:14px;"> 绳状熔岩属熔岩流表面构造，在结壳熔岩中随处可见。它</span><span style="line-height:2;font-family:SimSun;font-size:14px;">是熔岩流表层局部受到不同程度的推挤、扭动、卷曲而成，外</span><span style="line-height:2;font-family:SimSun;font-size:14px;">表形态与钢丝绳、麻绳、草绳等极为相似，表面粗糙，成束出</span><span style="line-height:2;font-family:SimSun;font-size:14px;">现。一般的绳状熔岩沿</span><span style="line-height:2;font-family:SimSun;font-size:14px;">流动方向都呈弧形弯曲</span><span style="line-height:2;font-family:SimSun;font-size:14px;">或呈链形排列，弧顶多</span><span style="line-height:2;font-family:SimSun;font-size:14px;">指向熔岩流动方向。</span>
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<span style="line-height:2;font-family:SimSun;font-size:14px;">杜鹃湖湖畔的熔岩流动构造</span><img src="/public/html_images/20140305/20140305200117_348.png" width="600" height="426" align="left" alt="" />
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<span style="line-height:2;font-family:SimSun;font-size:14px;"> </span>
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<span style="line-height:2;font-family:SimSun;font-size:14px;"> 熔</span><span style="line-height:2;font-family:SimSun;font-size:14px;">岩在流动过程中形</span><span style="line-height:2;font-family:SimSun;font-size:14px;">成的绳状构造</span>
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