论文部分内容阅读
引言鉴于现代生物沉积构造主要是通过兰绿藻捕获,粘合沉积物,以及它的碳酸盐沉淀活动形成的,而且在形态方面,这种构造类似于称为迭层石的古代沉积构造,所以,兰绿藻与碳酸盐沉积物之间的关系具有特殊的意义。迭层石最先是出现在约35亿年前的太古代,后来,在前寒武纪,特别是在23—6亿年前,这些迭层石有了明显的增殖。与某些迭层石共生的是一些被解释为兰绿藻和细菌的保存完好的化石微体生物,因此,集中研究现代和古代迭层石及其生物构成,对于了解兰绿藻的系统发育史和演化,它们的生态学以及它们在钙质沉积和生物沉积构造的形成中的作用。都很重要。
INTRODUCTION Since modern biotectic structures are predominantly captured by green algae, adhering to sediments and their carbonate sedimentation activity, and in terms of morphology, this structure is similar to the ancient sedimentary structures known as lamination stone, Therefore, the relationship between cyanobacteria and carbonate sediments is of special significance. The stratum was first seen in the Archean age of about 3.5 billion years ago, and later, in the Precambrian, especially from 2.3 to 0.6 billion years ago, these stratums multiplied significantly. Coexisting with some laminated rocks are well-preserved fossil micro-organisms that are interpreted as blue-green algae and bacteria. Therefore, it is of great importance to understand the phylogeny of blue-green algae by focusing on modern and ancient laminated rocks and their biological composition History and evolution, their ecology, and their role in the formation of calcareous and biotectic structures. It’s important.