Absolute dating technology
To discuss the divisions of geologic time, it is necessary first to discuss the concepts of relative and absolute time.The term relative refers to a quality or quantity that is comparative, or dependent on something else.In radiometric dating, the radioactive minerals within the rocks are used to know about the age of the object or the sites.
For the most part, we will not be concerned with the chronostratigraphic terms in the present context.
Its principal subdisciplines include stratigraphy, the study of rock layers, or strata, beneath Earth's surface; geochronology, the study of Earth's age and the dating of specific formations in terms of geologic time; sedimentology, the study and interpretation of sediments, including sedimentary processes and formations; paleontology, the study of fossilized plants and animals; and paleoecology, the study of the relationship between prehistoric plants and animals and their environments.
Several of these subjects are examined in essays within this book. The more well-known of these is the geologic scale, which divides time into named groupings according to six basic units: eon, era, period, epoch, age, and chron.
The latter, the study of Earth's physical history, is one of the two principal branches of geology, the other being physical geology, or the study of Earth's physical components and the forces that have shaped them.
The background of historical geology is discussed in some detail within the Historical Geology essay.These techniques are more complex and advanced regarding technology as compared to the techniques in practice in the relative dating.The absolute dating is also sometimes referred as the relative numerical dating as it comes with the exact age of the object.The absolute dating is more reliable than the relative dating, which merely puts the different events in the time order and explains one using the other.