岩床(sill)又称岩席(intrusive sheet)。是由岩浆沿层面流动铺开或岩浆沿着层面流动侵入,形成与地层相整合的板状岩体。岩床厚度一般较小、均匀,而面积较大。呈岩床产出的岩体以基性、超基性岩,镁铁质岩、超镁铁质岩为常见。
气候变暖正在冰层内产生巨大的瀑布,并在冰层和岩床之间形成河流。
Warming is creating giant waterfalls within the ice and rivers of water between the ice and bedrock beneath. Under this pressure, they say, the ice sheets could break up physically.
宽阔的冰河向后缩短了超过半英里,留下了岩床上几座正在消融的小冰峰。
The wide river of ice had retreated more than half a mile, leaving a field of separated ice pinnacles melting into the rocky ground.
在如此宽广的岩浆岩床烘烤下的有机沉淀物大大增加了甲烷和含碳气体的释放。
That vastly increases the volume of sediments the hot rock can cook and from which methane and other carbon-rich gases can be released.
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