lower devonian 中文意思是什麼
lower devonian
解釋
早泥盆世-
The origin and evolution of land plants was an important event in the history of earth life and has affected all other lives on the earth and global environment. during the past two decade, the new discoveries of fossil plants microfossils and megafossils from the mid - ordovician through all silurian to the lower devonian improved knowledge of the origin of land plants, provided a time framework of the basal groups for the land plants and the early evolution diversity of vascular plants. three new plant based epochs have been recognized. on the other hand, molecular sequence studies have provided insights into the phylogeny and early branches of land plants. a phylogenetic tree has been established by the joint of a study of comparative morphology and gene sequences. this paper summarizes recent advances and new knowledges, comments on the phylogenetic studies based on the cladistic analysis
陸生植物的起源和演化是地球生命中的重大事件，它影響到地球上所有的其他生命和全球環境。在過去的20年中，從中奧陶世歷經整個志留紀至早泥盆世的巖層中，化石植物微化石和大化石的新發現改變了人們對陸生植物起源的認識，並且為陸生植物和維管植物早期演化分異提供了基部類群分化的時間框架。據此人們識別出地史中的3個陸生植物的時代：始胚植物時代始維管植物時代和真維管植物時代。 -
This paper emphasize the research of geometry, kinematics, age of formation of oblique - thrustin. it is discussed that geological significance of obligue - trusting. ( 1 ) this paper classified the strata of sertengshan - xitieshan in northern qaidam basin into daken - dabanyan group in lower proterozoic, tanjianshan group in ordovician - silurian period, aimunike group in upper devonian period and guokesan formation of zhongwu - nunsan group in permo - carboniferous
（ 1 ）對柴達木盆地北緣的賽什騰? ?錫鐵山一帶出露的地層進行了較為系統的劃分，釐定了古元古代達肯大坂巖群、奧陶? ?志留紀灘間山（巖）群、泥盆紀上泥盆統埃姆尼克群、石炭? ?二疊紀中吾農山群果可山組。 -
After analyzing the geochemical characteristics and the hydrocarbon - generation intensity of the source rock, the authors consider that the lower triassic - devonian marine source rock has low - middle hydrocarbon - generation potential in the baise basin
在綜合分析烴源巖地化特徵和生烴強度的基礎上，認為百色盆地下三疊統泥盆系海相烴源巖具有低中等級別的生烴能力。 -
According to the chemical experimental data of residual organic carbon content, kerogen carbon isotope, aliphaltic gas chromatography mass spectrometry of 67 outcrop specimens in the baise basin, the authors analyse the geochemical characteristics of the type and the maturation of organic matter in the lower triassic - devonian source rock
根據百色盆地周緣大量露頭樣品的殘余有機碳含量、乾酪根碳同位素、飽和烴色譜及色質等地球化學實驗數據，分析了下三疊統泥盆系海相烴源巖的有機質豐度、類型、熱演化程度。
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