Evolution of Dinosaur Fossils

Nov. 26, 2018

Dinosaur fossils not only record the evolution of the entire biological world, but also the carrier of rich information on geological historical events. It is a complete and irreplaceable "geohistory" for studying the history of the earth. Let's take a look at the factors that led to the formation of dinosaur fossils!

1. Biological organisms should have certain hard bodies, such as bones, hard shells and shells. Hard bodies are easy to preserve. Animal excreta and excreta of physiological and reproductive functions, such as skin and feces, can also form fossils under special circumstances.

2. In the environment of hypoxia and rapid burial after death, it is beneficial to the preservation of non-mineralized animal and plant tissues, but it can not prevent the decay of biological remains caused by microbial bacteria. Only in the aseptic environment can the soft drive tissues be preserved.

3. Intermittent flooding is easily formed under suitable paleoclimate, especially in the dry climate, which creates favorable conditions for the development of floodplain deposits and the formation of "flood events" and the preservation of organisms.

4. After being buried, organisms undergo a certain geological period, and the crust descends, so that organisms are buried deep in the stratum. Under appropriate conditions of physical, chemical, temperature, pressure and favorable media, such as silicification, carbonization, calcification and so on, with the maturation and evolution of diagenesis and petrification. Rocks consolidate and form rocks, while organisms fossilize at this time.

5. In the whole process of fossil formation, the stable geological structure is always an important part of fossil preservation integrity. When organisms die, bury and fossilize, when tectonic movement occurs, organisms or fossils will be transported elsewhere, destroyed or partially or completely damaged in different water bodies and hydrodynamics or in the process of intense tectonic compression and tension, which is the last important condition for fossil preservation.

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    2020/10/27

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      2020/10/27

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    2020/10/25

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      2020/10/26

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    2020/10/22

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      2020/10/22

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    2020/10/18

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      2020/10/19

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    2020/10/17

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      2020/10/19

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    2020/10/16

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      2020/10/16

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    2020/10/15

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      2020/10/15

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    2020/10/15

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      2020/10/15

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    2020/10/15

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      2020/10/15

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    2020/10/14

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      2020/10/14

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