shales造句
Oil - yielding organic matter is contained in the
shales.
在这些页岩里有产油的有机物质.
Thus clays and
shales tend to be impermeable.
因此粘土和页岩就往往不透水.
Sandstones are, as a rule , interbedded with
shales.
砂岩通常都与页岩互层.
Alternating sandstones and
shales are regarded as important.
蚀变的砂岩和页岩是很重要的.
The ichthyosaur remains are found in black, bituminous marine
shales deposited about 190 million years ago.
人们在黑色的 、 含沥青的海洋页岩中发现了约1.9亿年前沉积下来的鱼龙化石.