The whole sequence represents a complete volcanic-eruptive sedimentary cycle .

整个层序反映了一个较完整的火山喷发沉积旋回。

The deposits eventually become pressed under sedimentary weight into stone .

这些沉积物最终被沉淀性的重量压成岩石。

The study is based on 80 ice cores and sedimentary samples taken from greenland , lake bottoms and sea floors on every continent .

该项研究以80个冰岩芯和沉积物样本为依据，它们取自格陵兰岛、每个大陆的湖底和海底。

Oil production from shale rock , a technically complex process of squeezing hydrocarbons from sedimentary deposits , is just beginning .

页岩石油开采，一个从沉积矿床中挤出烃的技术复杂的过程，才刚刚兴起。

It resembled sedimentary rock with the occasional fossil of a long-lost feature or inadvertent vulnerability .

它看起来就像是沉积岩，夹杂着灭绝生物的化石和不为人所知的弱点。