Like America, Europe has vast beds of shale rock, in which innumerable bubbles of natural gas are trapped.

欧洲有丰富的页岩底层，比如在美国能捕获无数天然气的气泡。

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Usually, it happens when the substrate is formed by limestone, carbonate rock, salt beds or any other rock that is easily eroded by water streams.

通常，它发生在基板是由石灰岩，碳酸盐岩，盐层或任何其他岩石，很容易被水侵蚀形成的溪流。

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Marmatite is the guide mineral of the second ore type which appears in bedded, veined and irregular ore bodies near contact zone of magmatic rock or joint positions between faults and ore beds.

另一种以铁闪锌矿为标志，矿体呈似层状、脉状及不规则状等，靠近岩体接触带或断裂与赋矿层的交汇部位产出，代表了成矿第二世代。

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"The Killers were fairly unknown at that time, but we became friends when we were staying in London at the Columbia, which is sort of a rock 'n roll hotel, three beds to a room, " he said.

BBC: Brandon Flowers

Potash is a soft rock, which is extracted from sedimentary sea beds formed by evaporation of ancient seas, which is mined via conventional shaft mining like gold and silver.

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Whether you pick the deluxe king room with rock spa bath products, iPod docking stations, and pillow-top beds or the 750-square-foot tower suite with separate showers and tubs, panoramic views of Chi-Town, and separate living and sleeping areas, both blend musical memorabilia with a boutique-style contemporary atmosphere.

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