熔岩陷谷(坑)
2014-03-05 00:00:00
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<span style="line-height:2;font-family:SimSun;font-size:14px;"> 熔岩陷谷(坑)是石塘林熔岩台地中常见的熔岩构造。陷</span><span style="line-height:2;font-family:SimSun;font-size:14px;">谷多呈长条形、近圆形。熔岩陷谷(坑)的成因多是由于熔岩</span><span style="line-height:2;font-family:SimSun;font-size:14px;">隧道塌陷或熔岩流底部局部存在大量气液组分,待冷却后体积</span><span style="line-height:2;font-family:SimSun;font-size:14px;">收缩,在重力作用下导致地表的熔岩陷落。</span>
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<span style="line-height:2;font-family:SimSun;font-size:14px;">熔岩陷谷(坑)</span>
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