The Burgess Shale formation also has fossils of many extinct representatives of modern animal groups.

伯吉斯页岩地层中也有许多代表着现代动物群中已经灭绝的物种的化石。

youdao

A shale formation with sandstone interbedded is also a potential oil bearing formation.

以泥岩为主，夹砂岩的地层也可能是油气层。

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There are many factors to affect identification of oil and gas bearing layers in the sand-shale formation.

在砂泥岩地层中，影响油、气层识别的因素较多，尤其在复杂地质条件下准确识别油气层难度更大。

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McClendon says the Haynesville shale formation in Louisiana and Texas holds serious potential.

FORBES

The enormous pressure of the shale formation sends oil and gas gushing out the well when it is first fracked.

FORBES: Will Natural Gas Stay Cheap Enough To Replace Coal And Lower US Carbon Emissions

But these days, he's house hunting in San Antonio, the biggest city near the booming Eagle Ford Shale formation, a prime location for hydraulic fracturing.

WSJ: From Oil, a Land Rush��WSJ Mansion