Biostratigraphy type relative dating technique
In radiometric dating, the radioactive minerals within the rocks are used to know about the age of the object or the sites.
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This characteristic makes the fossils of planktonic forms—particularly calcareous nannofossils, planktonic foraminifera, dinoflagellates, and graptolites—and nektonic organisms such as conodonts excellent regional and even worldwide time markers in marine strata.
Summaries of zonations based on the ranges of planktonic microorganisms include Blow Benthic taxa are most useful for detailed local correlations and paleoenvironments.
As the word relative tells that defining the object with respect to the other object, it will be pertinent to mention here that actual numerical dates of the rocks or sites are not known in this type of dating.
Species extinctions, often referred to as “tops,” are used as horizons of correlation.
In other words, we can say that in relative dating the archaeologist determines that which of the two fossil or the artifacts are older.
Contrary to this, absolute dating is the technique, using which the exact age of the artifacts, fossils, or sites are ascertained.
This evaluation of the rocks and fossils in relative dating is known as the biostratigraphy.
The absolute dating is the technique to ascertain the exact numerical age of the artifacts, rocks or even sites, with using the methods like carbon dating and other.