how are fossils obtained???
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fossils are obtained in different ways but most of the fossils are formed when plants and animals are dies in a watery environment and is buried in mud and silt
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Fossil is any preserved remains, impression, or trace of any once-living thing ... to body fossils.
Some fossils are biochemical and are called chemofossils or biosignature.
Permineralization is a process of fossilization that occurs when an organism is buried.
The empty spaces within an organism (spaces filled with liquid or gas during life) become filled with mineral-rich groundwater.
Radiometric dating. This technique is our only means of giving rocks greater than about 50 million years old an absolute age, and can be accurate to within 0.5% or better
When dug into the Earth, the fossils closer to the surface are more recent as compared to the fossils found in deeper layers
Authigenic mineralization
This is a special form of cast and mold formation. If the chemistry is right, the organism (or fragment of organism) can act as a nucleus for the precipitation of minerals such as siderite, resulting in a nodule forming aroumaterial
The fossils can also be dated by detecting the ratios of different isotopes of the same element in the fossil material
Replacement occurs when the shell, bone or other tissue is replaced with another mineral.
Some fossils are biochemical and are called chemofossils or biosignature.
Permineralization is a process of fossilization that occurs when an organism is buried.
The empty spaces within an organism (spaces filled with liquid or gas during life) become filled with mineral-rich groundwater.
Radiometric dating. This technique is our only means of giving rocks greater than about 50 million years old an absolute age, and can be accurate to within 0.5% or better
When dug into the Earth, the fossils closer to the surface are more recent as compared to the fossils found in deeper layers
Authigenic mineralization
This is a special form of cast and mold formation. If the chemistry is right, the organism (or fragment of organism) can act as a nucleus for the precipitation of minerals such as siderite, resulting in a nodule forming aroumaterial
The fossils can also be dated by detecting the ratios of different isotopes of the same element in the fossil material
Replacement occurs when the shell, bone or other tissue is replaced with another mineral.
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