x******e
发帖数: 193 | 1 杂志：Australian Journal of Earth Sciences
文章：Oxidation Event: new insights into an ancient problem
作者：D. T. Flannerya & M. R. Walter
摘要：The macroscopic fossil record of the Archean consists solely of
stromatolites and other microbialites, which seldom offer compelling clues
to the identities of the organisms that formed them. Tufted microbial mats
are an exception because their formation is known to require a suite of
morphological and behavioural characteristics from which the behavioural and
biological affinities of early microbialite-constructing microbes can be
inferred. Here, the oldest yet reported convincing fossil tufted microbial
mats are described and discussed in the context of other ancient and modern
examples. Significantly, cyanobacteria dominate all known modern occurrences
and may also have been the builders of ancient examples, the oldest of
which predate by several hundred million years the earliest convincing
cyanobacterial microfossils and most geochemical evidence for an oxygenated
atmosphere.
中文摘要：太古代大化石记录组成仅有叠层石和其它一些微生物化石，很少能提供令人
信服的线索来鉴定形成这些化石的生物。而丛生微生物席是个例外，因为他们的形成需
要一套形态上和行为上的特征，通过这些特征我们可以推断出早期组构微生物化石的微
生物体的行为学和生物学的亲缘关系。在此，我们描述了最老的且已报道的令人信服的
从微生物席化石，并结合其它吾老的现代的标本加以讨论。重要的是，蓝藻在所有已知
种类中占优势，已有可能是元古微生物化石的建造者，最早的代表屄最早确凿的蓝藻微
化石还要早若干亿年，是含氧大气层的地球化学证据。
中文翻译还行，不过“蓝藻”严格上应该翻译为“蓝细菌”。 |
|
