The correct answer is they are produced by cyanobacteria.. Stromatolites are being produced by cyanobacteria. Stromatolites are termed as layered mounds, which have columns and also sheet like rocks which are originally formed with growth of layers.
Stromatolites are formed by primitive one-celled cyanobacteria, which are also known as blue-green algae. These deposits consist of thin, alternating dark and light layers. The photosynthesizing cyanobacteria can be found in a wide range of environments including rivers, soils, lakes, and shallow shelves.
Studying living stromatolites is absolutely essential to determining the biogenicity of fossil stromatolites and understanding how such structures form and grow. The microstructure of living stromatolites closely resembles that of fossil stromatolites (although there is a paucity of fossilized bacteria in fossil stromatolites) (Reid et al. 1995 ...
Stromatolites. Stromatolites are layered mounds, columns, and sheet-like sedimentary rocks. They were originally formed by the growth of layer upon layer of cyanobacteria, a single-celled photosynthesizing microbe that lives today in a wide range of environments ranging from the shallow shelf to lakes, rivers, and even soils.
Stromatolites are a major constituent of the fossil record of the first forms of life on earth. They peaked about 1.25 billion years ago and subsequently declined in abundance and diversity, so that by the start of the Cambrian they had fallen to 20% of their peak. The most widely supported explanation is that stromatolite builders fell victim to grazing creatures (the Cambrian substrate ...
Stromatolites are layered mounds, columns, and sheet-like sedimentary rocks. They wereoriginally formed by the growth of layer upon layer of cyanobacteria, asingle-celled photosynthesizing microbe that lives today in a wide range of environmentsra...
What Are Stromatolites? Stromatolites are large formations of rocks that have been formed by the growth of multiple layers of bacteria over a very long period of time. These usually take the shape of mounds, columns and sheets. Cyanobacteria, single-celled microbes that can perform photosynthesis, develop into these stromatolites.
rocks similar to stromatolites can originate by direct precipitation of silica or calcium carbonate without the intervention of the metabolic activity or algae or bacteria. Consequently the origin of precambrian stromatolites has been a subject of considerable controversy. The discovery of actual preserved remains of algae and bacteria in some ...
Stromatolite, layered deposit, mainly of limestone, formed by the growth of blue-green algae (primitive one-celled organisms). These structures are usually characterized by thin, alternating light and dark layers that may be flat, hummocky, or dome-shaped. The alternating layers are largely produced by the trapping of sediment washed up during storms on some occasions and by limestone ...
Stromatolites are among the world's oldest fossils, some of which are over 3.5 billion years old. Stromatolites are structures formed by huge colonies of cyanobacteria , formerly called blue green algae , which contributed directly to the formation of the Earth's atmosphere and its currently habitable state.