What do the conditions of carbon isotopes tell us about mass extinction?

Testing the ratios of carbon isotopes of ancient layers or fossils can be useful in access to climatic conditions and biological productivity at the time they were determined. The use of carbon isotope in this way is based on the principle that photosynthetic organisms such as eyelashes preferably capture lighter and more common carbon-12 when leaving a heavier carbon-13. During mass extinction, less preferential carbon absorption is-12, which is reflected in sediments. It seems that the analysis of these isotopes suggests that life has undergone five large extinction over the last half a billion years, although three of them were significantly more significant than the other two. All these mass extinction have been confirmed by a sharp decrease in the biodiversity in fossil records. Inlet in carbon isotopes over time are called inputs and excursions.

In addition to access to mass extinction, the ratios of isotopes uThey also use the honey to estimate the origin of life. Recently, evidence of carbon isotopes pointed to the extremely early origin of photosynthetic cyanobacteria, the first known living organisms, up to 4.3 billion years ago, only 100 million years after the initial liquefaction of water and about 267 million years after the Earth. If this is true, it is fascinating, because earlier estimates of the origin of life placed it much later, about 3.6 billion years. If life was formed so soon after the initial origin of the country, why does it seem to be so rare in space? Perhaps most of the life in space consists only of microbes, but if so, it may seem unusual that none of these microbes has yet developed into an intelligence being that visited us.

The ratios of carbon isotopes can also be used to access the degree of circulation in the oceans millions of years ago. When the circulation is low, the biomaterial rich in carbon-12 drops into the seabed and stays there. As a result, the subsequent organisms are relatively rich in carbon-13.When the circulation is good, the carbon-12 is brought back to the top and the organisms have a normal carbon ratio to carbon-13.