layers of shale造句

This formation consists of a layer of shale, sandstone, and silt.
Continuing through layers of shale, it dissolved out the emerald ingredients.
The two bentonite layers are also separated by layers of shale and carbonate rocks.
It is assumed that it was named because of the thick layer of shale on the mountain.
The roads, some paved, wear shifting layers of shale dust, which April storms whip into blistering fogs.
It's difficult to find layers of shale in a sentence. 用layers of shale造句挺难的

On the east side the cliff is tall,, and consists of alternating layers of shale, sandstone and clay.
The layers of shale and coal that are common in the Narraganset Bay area were formed during this period.
But in the early 1930s the miners hit a layer of shale which soon widened, eventually choking off coal production.
These landslips, which are caused by unstable lower layers of shale, also give the hill its alternative name of " Shivering Mountain ".
On the De-Na-Zin ( eastern ) side of the Wilderness, the exposed layers of shale coincide with the K / T boundary layer.
The occasional layer of shale also caused construction and conservation difficulties, as this rock expands in the presence of water, forcing apart the stone surrounding it.
They drilled injection wells and pumped the wastes at high pressure into porous sandstone layers, surrounded at least in part by layers of shale and clay that impede migration.
The preferred stratum for deep injection, one paper said, was porous sandstone covered by abundant layers of shale or clay, which were seen as good barriers to upward migration.
When gas or fluids migrate up through the sand and reach this impermeable layer, pressure may build up in the sand and push up against the impermeable layer of shale.
Roy had similar fortunes drilling the perimeter of the old Humble Field, championing a troublesome layer of shale rock 3, 500 feet below the surface, eventually reaching oil-rich Yegua sand.

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