archdeacon───n.领班神父;副监督;n.(Archdeacon)人名;(英)阿奇迪肯 archenteron───n.[胚]原肠;消化道 archaea───n.古生菌 archaeal───古老的 archaeo-───档案文件 双语使用场景 英语使用场景 archaean period archaean eon archaean craton...
Presents research which reported the discovery of oil preserved in fluid inclusions in sandstones dating before the Archaean period. Oil thought to be geologically young; Oldest known oil; Locations of the oil inclusions discovered; Role of fluid inclusions in protecting the oil; Insights in the ...
noun the Archean Period, or the rock formations that date from that time.
Precambrian,Precambrian aeon,Precambrian eon,Precambrian period- the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago Adj.1.archean- of or relating to the earliest known rocks formed during the Precambrian Eon ...
Some of the metamorphic rocks may belong to the older Palaeozoic period, but the greater part of the series is probably Archaean. From Project Gutenberg They are known to be pre-Jurassic, but whether they are Palaeozoic or Archaean is uncertain. From Project Gutenberg They appear in contact ...
6. It suggests that gold accumulation occurred in the every main stage of geologic history of fujian from late - archaean era to quaternary period but the scale and the feature of the gold accumulation are different in different stage and yanshan metallogenic epoch is the most important period ...
After a number of decades of research on the evidence for life in the Early Archaean epoch (4.0-3.2 Ga), recent controversies have thrown the very concept of the existence of life on Earth in this time period into discussion (Brasier et al., 2001; Lindsay et al., 2003 ; Westall and ...
Also in the bottom left of the page several parts of wikipedia pages related to the word Archaean and, of course, Archaean synonyms and on the right images related to the word Archaean. Definition of Archaean ArchaeanArchaean Ar*ch[ae]"an, n. (Geol.) The earliest period in ...
Even so, the time period corresponding to this transition is debated, with propositions ranging from the Eoarchaean to Neoproterozoic26,48,49,50. Stagnant-lid regimes differ from plate tectonic (mobile lid) regimes in being dominated by vertical tectonic motion and deformation (e.g., dome and ...
2001). During the time period 1.9–1.8 Ga ductile deformation and metamorphism partially reworked Archaean rocks and affected regionally the Palaeoproterozoic (2.5–1.8 Ga) rocks. After ca. 1.9 Ga several phases of deformation, metamorphism and hydrothermal alteration have been distinguished (e.g. ...