shale

the shales are overthrust by Carboniferous rocks.

the raw shale is retorted at four crude oil works.

Resinite is a rich n1aceral in Teriary humic coal,boghead-cannel coal and oil shale fromHuangxian Coalfield.

In lamina of shale which deposited in deep lake away from paleo-debouchment in the Shahejie Formation in the Jiyang Depression, some aeolian silty sand was discovered.

Kapeng syderolite deposit is large,occurred in purple clayey ferruginous mudstone and grey-green clayey shale of Lower Silurian series.

In Estonia three types of shale tar have been used as alternatives to anthracene oil or carbolineum.

In the pale light of the tunnel, 30-foot fossil traces of lycopsid gleam slickly in the shale roof like alligator skins.

Double Rollers Crusher is used to crush clunch and partial shales for brick enterprises. It has two rollers to circumrotate in reverse. The clunch between rollers are crushed by extrusion.

Its basement is mainly composed of Paleozoic epimetamorphic rocks and the cover mostly consists of Cretaceous graywacke and organic shale formation,as well as Cenozoic loose elastic accumulations.

Martini A M.Walter L M.Budai J M Genetic and Tem poral Relations between Formation Waters and Biogenic Methane:upper Devonian Antrim Shale,Michigan basin,USA

The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.

A new type shale inhibiter，KLG and sealing agent are used to seal fragile formation so that we can enhance safety density and solve the problem of hole collapse.