砂岩通常都与页岩互层.Sandstones are, as a rule , interbedded with shales.最粗粒砂岩与灰色泥岩成互层.The coarsest sandstones intercalated with grey mudstones.砂岩储层与火山岩是互层分布, 其厚度呈负相关.Sandstone reservoir and volcanic rock distribute alternately, t...
The natural vegetation consisted of evergreen broad - leaved forest ever - green bushland, mangrove thickets and grassland.该地天然植被有常绿阔叶林 、 丛、树林、坡等....the thorn and bramble thickets.荆棘密布的灌木丛The delta region of the Rio Gran...