Generally speaking, the smaller Porosity, the more dense rock, the greater surface area, the lower permeability, the more serious the adsorption phenomenon is.

总体而言，孔隙度越小，岩石越致密，比表面越大，渗透率越低，吸附现象越严重。

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The problem was that (gas) was locked in shale, the extremely dense layer of rock under Dallas and Forth Worth.

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The entire city of Fort Worth sits over a gas dense layer of black rock called the Barnett Shale that only recently became possible to access.

NPR: Drilling for Gas in Dallas-Fort Worth

With its riff-heavy mixture of classic rock and Craig Finn's lyrically dense storytelling, the group crafts detailed musical universes that have already made it a critical darling and fan favorite.

NPR: Dr. John, Hold Steady, Ani DiFranco in Concert