Hello friends of steemit, this is my first post, my name is alexandra pierrini, they are engineering in geology, thinking about what would be my first publication I came to the conclusion that this had to be like the origin of a great adventure that is why it was I happened to make a publication with particularity, this would be the beginning of a series of publications that would have as original title "Curiosities on geology", this title will have associated topics of interest for the science of geology, in this case the first topic it's about fossils - friends of dinosaurs and paleontology. For many of you, talking about fossils has a great relationship with any rest of an organism of the past that has been preserved, because nevertheless for us the geologists to speak of fossils is to speak of history and time at the same moment, the fossils are organisms that have millions of years, these usually appear in groups forming large deposits, the science of geology allows us to study fossils through paleontology, the importance of these friends studies is that by knowing the geological ages of fossils we can know the life in the past of our planet and especially that organism inhabited it.
Well, giving a brief summary of what I will show in this publication, I can only invite you to observe, as the science of geology presents such topics
From Bones to Rocks
The fossils are remains or remains of dead plants or animals that for a long time did not undergo the process of putrefaction and that after many years became part of a crust of the earth.
The fossils can be formed by the same dispossession of the dead organism by its impression in the sediment, or by the marks that I leave in life, in such case they are fossil remains.
In order for fossilization and fossils to have an effect, rapid burial is usually necessary by water sediment. This process is followed by a chemical alteration in which mineral substances can be added or deleted.
The fossilization in the best of cases, is a risky process that depends on a concateracion of favorable circumstances. The vast majority of plants and animals that once lived disappeared completely without leaving any trace without leaving a fossil record.
How is the process of Fosilization
The fossil record presents a process of fossilization which establishes a series of procedures explained below:
After dying, the organism is carried by a river or lake and, either the fish serves as food or decomposes their organs, skin and others; but in both cases, the skeleton is preserved.
The water deposited sand and mud on the skeleton. These prevented their deterioration and compressed the bones, so that they would not disperse.
Over time the bone tissue was replaced by minerals and the skeleton came to the surface.
In the image shown below you can observe in detail how the fossilization process is carried out.
Except in rare exceptions, only the skeleton and the hard parts of the organism remain fossilized. This decomposes inside the sediment, alters the local conditions and promotes the incorporation of mineral salts in its structure, a process that is called mineralization.
What we call mineralization
Mineralization is called the process of decomposition of the organic matter of the soil in which inorganic nitrogen is released. Mineralization is the transformation of organic nitrogen into ammonium, through the action of soil microorganisms. In general, this term of "mineralization" indicates the overall process of conversion of organic nitrogen into mineral nitrogen, mainly nitrate and ammonium.
This chemical change allows fossils to become more resistant than the surrounding sediment. After death an organism can slowly disintegrate or remain buried in soft sediments, in the latter case it can also be digested or altered by sedimentary organisms or else exposed by activity. of the currents of the waves.
As the sediment is compacted and have complex deagenesis reactions, the fossils can dissolve. But if the sediment is sufficiently consolidated a mold can be formed. The percolation of mineral solutions can fill the mold, thus creating a permanent internal mold. Some enter the sediment slightly altered by mineralization. With the action of depth, temperature, time and pressure, the sedimentary rocks are destroyed, when the rocks are folded and eroded, the fossils can emerge to the surface.
Below is an explanatory video of how the history of dinosaurs is related to fossil remains:
Conclusion
In my first publication I can say that the goals were met, the issue of the fossils is of great importance for the knowledge of humanity, because through the study of geological science you can know the life of the past, in conclusion we can determine our origin on earth through the knowledge of different geological ages. Friends invite you to be attentive to a forthcoming publication, with a greater informative quote, taking as a point of reference the main theme "Curiosities on geology".
Greetings friends ..
References Bibliography :
Rupperts, E. & Barner, R. (1995). Zoology of invertebrates. (6th ed.). Mexico:
McGraw-Hill Interamericana. 1114 p.
Mascotay, O. & Campos, R. (2001). Mollusks representative of the platform
Margarita -Venezuela: Description of 24 new species. Venezuela: Oliver Mascotay / Regulo Campos.
Virtual Geological Museum of Venezuela (1997). Calcidurita from Castillo de Araya.