varve

音標(biāo)發(fā)音

Recently the study of maar lake and varve chronology is becoming a new field for palaeoclimate research.
火山活動(dòng)是影響全球變化的重要因素之一，瑪珥湖和紋泥年代學(xué)是近年來古氣候研究的新領(lǐng)域。
Detailed investigations were carried out on the upper undisturbed sediments from Erlongwan maar lake, NE China, which are better annually laminated sediments(varve).
通過對東北二龍灣瑪珥湖頂部無擾動(dòng)巖心顯微研究，証明此巖心發(fā)育有良好的年紋層。
The aeolian silty sand in shale can provide good guide to study of paleoclimate about lacustrine shale and varve, and to reconstruct sedimentary environment of paleolake accurately.
頁巖中風(fēng)成粉砂沉積的發(fā)現(xiàn)，可以進(jìn)一步爲(wèi)研究有關(guān)湖相頁巖和第四紀(jì)紋泥的古氣候變化、正確恢複古湖泊沉積環(huán)境提供良好的指標(biāo)。

a typically thin band of sediment deposited annually in glacial lakes, consisting of a light layer and a dark layer deposited at different seasons