sandstones是什么意思？

sandstones

例句

• Alternating sandstones and shales are regarded as important. 蚀变的砂岩和页岩是很重要的.
• The coarsest sandstones intercalated with grey mudstones. 最粗粒砂岩与灰色泥岩成互层.
• Sandstones are, as a rule , interbedded with shales. 砂岩通常都与页岩互层.
• The reservoir is mainly composed of lithic arkoses, some lithic feldspathic sandstones, and feldspathic litharenite sandstones. 本区储层岩性以岩屑长石砂岩为主, 部分为岩屑质长石砂岩和长石质岩屑砂岩.
• The fossils at Dinosaur Cove are embedded in hard sandstones. 恐龙峡谷中的化石都嵌在坚硬的砂岩中。