lower strata

Rhodymenia palmata resembling the fan shapes of cactus. I observed that green-colored plants kept closer to the surface of the sea, while reds occupied a medium depth, which left blacks and browns in charge of designing gardens and flowerbeds in the ocean's lower strata.

我注意到较近海面的一层是青绿色的海草，在更深一些的地方是红色的海草，黑色或赭色。的水草就在最深处，形成海底花园和草地。

Results from petroleum explorations for nearly four decades in the South Yellow Sea indicate that in the Yangtze massif, are developed a complete set of Mesozoic-Paleozoic marine strata with large thickness and wide distribution, and only upper Silurian and lower Devonian are absent.

南黄海海域油气勘探近40年成果证实，处于扬子地块之上，除缺失志留系上统和泥盆系下统，发育了较完整的中、古生代海相地层，厚度大，分布广。

What pen could describe it? Who could portray the effects of this light through these translucent sheets of water, the subtlety of its progressive shadings into the ocean's upper and lower strata?

无论多么高明的妙笔也描写不出来！谁能描绘光线穿过透明的水流所产生的新奇景色呢守谁能描绘那光线照在海洋上下两方，渐次递减的柔和光度呢！

From the middle Triassic to the early Oligocene, the A-type subduction lasted about 180 ma and major tectonic stage is the middle Triassic. In the lower Yangtze region, there exist good oil generating, bearing and covering bed assemblages in the marine strata.

A型俯冲始自中三叠世末，延续到渐新世初，持续了约180Ma，主构造期为中三叠世末。

There are two strata series of the Lower-middle Jurassic and the Lower Cretaceous potential source rock in Yinger depression, the eastern Jiuquan basin.

酒东盆地营尔凹陷存在下白垩统和中、下侏罗统2套生油层。