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Anonymous users2024-02-11Fossils include trilobite fossils, plant fossils, shell fossils, footprint fossils, dinosaur fossils, fish fossils, etc. 2. Fossil formation conditions: (1) Organic matter must have a hard part.
Such as shell, bone, tooth, or woody tissue. However, under very favorable conditions, even very fragile organisms, such as insects or jellyfish, are able to turn into fossils. (2) Creatures must be avoided from destruction immediately after death.
If a creature's body parts are crushed, decayed, or severely weathered, this may alter or eliminate the possibility of the organism becoming fossilized. (3) Organisms must be quickly buried by something that hinders decomposition. And the type of material that is buried usually depends on the environment in which the organism lives.
Hello, thank you for your patience and glad to answer for you <>1Types of fossils: Fossils include trilobite fossils, plant fossils, shell fossils, footprint fossils, dinosaur fossils, fish fossils, etc.
2. Fossil formation conditions: (1) Organic matter must have a hard part. Such as shell, bone, tooth, or woody tissue.
However, under very favorable conditions, even very fragile organisms, such as insects or jellyfish, are able to turn into fossils. (2) Creatures must be avoided from destruction immediately after death. If a creature's body parts are crushed, decayed, or severely weathered, this may alter or eliminate the possibility of the organism becoming fossilized.
(3) Organisms must be quickly buried by something that hinders decomposition. And the type of material that is buried usually depends on the environment in which the organism lives.
3. Fossil preservation types can generally be divided into solid fossils, molded fossils, relic fossils and chemical fossils. (1) Solid fossils refer to fossils that have been preserved in whole or in part by paleontological remains, such as insect fossils in amber in the Tertiary coal seam in Fushun, China, which are preserved under strict enclosure. (2) Molded fossils refer to the impressions and recasts left by biological remains in the substrate, surrounding rock, and filling.
According to the relationship between fossils and their surrounding rocks, they can be divided into several types, such as imprinted fossils, impression fossils, cast fossils and compound fossils. (3) Relic fossils refer to the traces and relics left on the surface or inside the sediment of ancient organisms during their life activities, such as fossils of vertebrate footprints, reptile fossils of Demodex animals, and fossilized fecal or egg fossils of animal excrement. In a broad sense, the fossils also include the labor tools and cultural relics of ancient humans in the Old Ancient Period.
4) Chemical fossils refer to the fact that although the remains of ancient organisms have not been preserved, the organic components that make up the organisms have been decomposed to form various organic substances such as amino acids and fatty acids, which can still be retained in rock formations, which is enough to prove the existence of ancient organisms.
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Anonymous users2024-02-101. Fossils are the remains of paleontology, relics or relics that remain in ancient strata. There are many ways to classify fossils, the most common way is to divide them into three categories according to the type of biological remains they remain: solid fossils, relict fossils, and molecular fossils.
2. The biological boundary is generally bounded by 10,000 years ago, the organisms of 10,000 years ago are paleontology, and the organisms after 10,000 years ago are living organisms. Due to natural disasters, such as volcanic eruptions, mudslides and other natural disasters, they are instantly buried, isolated and oxidized.
3. In the long geological time, there have been countless creatures living on the earth, and many of the remains of these creatures after death or the traces left by life have been buried by the sediment at that time.
4. In the years that followed, the organic matter in the remains of these organisms was decomposed, and the hard parts such as the shells, bones, branches and leaves, etc., were petrified and turned into stone along with the surrounding sediments, but their original form, structure (and even some subtle internal structures) were still preserved.
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Here's how fossils are formed:
There are two types of fossils, one is formed by the decomposition of the organic part of the body and the petrification of the hard part after the death of the organism on the earth. The other is the traces left by those creatures, which are formed by turning into stone after petrification. It takes hundreds of millions of years to form and can be divided into plant fossils including roots and leaves, and animal fossils including teeth and footprints. >>>More
Fossils are the relics of ancient creatures buried in the strata. The most common fossils are formed from teeth and bones. After the death of ancient animals, the internal organs, muscles and other soft tissues of the corpse will quickly decay, and the teeth and bones can be preserved for a longer time because there is less organic matter and more inorganic matter. >>>More
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