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They 're comprised of massive sandstones , with interbedded shale layers and lenses , and conglomerate .

它们是由大规模的层间镶嵌页岩和晶体砂岩，以及砾岩所组成。

Nor is shale gas the only new sort of reserve : " tight gas " in sandstones and coal-bed methane ( the sort of gas that used to kill canaries down mines ) are also promising .

不是只有页岩气是一种新的储备能源：在砂岩中的“致密地层天然气”还有在煤层里的甲烷（一种能在矿井里杀死金丝鸟的气体）也十分有前景。

After a quick lunch , we continued our walk on the opposite side of herto village , dropping down the eastern slope of the bouri ridge into a scorching moonscape of gray sandstones , barren and bizarre , pocked with little caves and intricately carved pillars .

吃完一顿简单的午饭以后，我们又向赫托村的对面继续进发，沿着鲍里山脊的东边斜坡滑落进一片炙热的灰色砂岩地带，这里荒凉怪诞得如同月球表面一般，地面上布满了凹洞和杂乱无章的石柱。