火山基浪堆积剖面
2014-03-05 00:00:00
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<span style="line-height:2;font-family:SimSun;font-size:14px;"> 基浪堆积是由于水和</span><span style="line-height:2;font-family:SimSun;font-size:14px;">岩浆相互作用，由此引起</span><span style="line-height:2;font-family:SimSun;font-size:14px;">射气岩浆爆发而形成的低</span><span style="line-height:2;font-family:SimSun;font-size:14px;">密度火山碎屑涌流，在沿</span><span style="line-height:2;font-family:SimSun;font-size:14px;">地面快速流动过程中堆积</span><span style="line-height:2;font-family:SimSun;font-size:14px;">形成的产物。其主要特征</span><span style="line-height:2;font-family:SimSun;font-size:14px;">是发育良好的平行层理和</span><span style="line-height:2;font-family:SimSun;font-size:14px;">交错层理，堆积物成分为</span><span style="line-height:2;font-family:SimSun;font-size:14px;">玄武质火山渣与基底或围</span><span style="line-height:2;font-family:SimSun;font-size:14px;">岩岩石碎屑共存。</span>
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<span style="line-height:2;font-family:SimSun;font-size:14px;"><img width="556" height="809" alt="" src="/public/html_images/20140305/20140305202505_640.png" /></span>
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<span style="line-height:2;font-family:SimSun;font-size:14px;">火山射气喷发形成的层状堆积物</span>
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