熔岩洞
2014-03-05 00:00:00
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<span style="line-height:2;font-family:SimSun;font-size:14px;">熔岩流表面凝结而底部仍是液态熔浆流动,又无新的熔</span><span style="line-height:2;font-family:SimSun;font-size:14px;">浆补充时,便形成形似隧道的洞穴,即熔岩洞。洞口多呈拱</span><span style="line-height:2;font-family:SimSun;font-size:14px;">形,洞高一般在2米以内,洞的深浅不一,有的已陷落成沟。</span><span style="line-height:2;font-family:SimSun;font-size:14px;">洞穴的熔岩流表面多有熔岩棘,部分熔岩呈绳索状、涟漪状或</span><span style="line-height:2;font-family:SimSun;font-size:14px;">垅状。</span>
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<img width="600" height="429" alt="" src="/public/html_images/20140305/20140305002709_687.png" />
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<span style="line-height:2;font-family:SimSun;font-size:14px;">熔岩中发育的熔岩洞</span>
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