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What information did geologists use to develop the geologic time scale?
Wiki User
∙ 12y ago
Radiometric dating and association of fossils with time scales during the periods when life existed.
Wiki User
∙ 12y ago
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How did geologists determine the division of the geologic time scale?
fossils contained within the rock. got answers from Earth Science book while doing my HW
Why did geologists develop the geologic time scale?
The geological time scale is the geologic history of the planet from formation to the present. It starts with large divisions of time called eons and is subdivided into successively smaller units of time based on dominant lifeforms, extinction events, even climate. The development of the geologic time scale was initially based on the observation and reasoning that deeper layers of rock are generally older than less deep layers in what is called the "Law of Superposition".Paleontologists look for index fossils in fossil bearing sedimentary rock. Index fossils are organisms that were widespread, rapidly evolving, and only existed for a short period of time as evidenced by their appearance in the fossil record of specific rock strata. The appearance of a fossil alongside an index fossil gives a rough approximation of the age of the fossil in relative terms as it would appear on the geologic time scale. The appearance of the same fossil alongside index fossils of different geologic ages means that the fossil organism spanned multiple geologic time periods. Associations of specific strata alongside radiographically datable igneous and metamorphic rock determines the absolute age of a fossil.A period of around 4,600,000,000 years, the largest groupings of geologic time are eons, followed in descending order by era, period, epoch, and age.The geologic time scale is very important, especially in fields involving the exploration and retrieval of fossil fuels, which are geologically date range specific.
What is the purpose of the geologic time scale?
The scale outlines the development of Earth and life on Earth.
What is called the record of life forms and geologic events in earth's history?
the record of life forms and geologic events in earth's history is actually called the "Geologic time scale" fine sir. good day
What do periods on the geologic time scale represent?
An era, in geologic terms, is a geological time period encompassing two or more geologic periods.
What kind of scientists worked with geologists to develop the geologic time scale?
biologists
Geologists have divided earths history in the manaeable units that are represented by the?
Geologic time scale
Why did geologists develop the time scale?
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What kind of scientist worked with geologists to develop the geologic time scale?
Biologists, Geochemists, Petrologists, Stratigraphers and Palaeontologists all work to develop the geologic time-scale. Note that Petrology, Stratigraphy and Geochemistry are specialised forms of science that fall under the more general heading of Geology. Palaeontology lies somewhere between Geology and Biology.
What kind of scientist work with geologists to develop the geologic time scale?
Biologists, Geochemists, Petrologists, Stratigraphers and Palaeontologists all work to develop the geologic time-scale. Note that Petrology, Stratigraphy and Geochemistry are specialised forms of science that fall under the more general heading of Geology. Palaeontology lies somewhere between Geology and Biology.
What methods did geologists use when they first developedthe geologic time scale?
Scientists first developed the geologic time scale by studying rock layers and index fossils worldwide. With this info. (information if you forget!), scientists placed Earth's rocks in order by the relative age.
What methods did geologists use when they first developed the time scale?
The methods the geologists used when they first developed the geologic time scale. Were studying rock layers and index fossils worldwide. By Patrick
How did geologists determine the divisions of the geologic time scale?
Mainly abrupt changes in mineral layers or the fossils in them.
What divides the history Earth into time units that help geologists analyze the rock record?
Geologic Time scale
What kind of scientist worked with geologist to develop the geologic scale?
biologists
What kind of scientists worked with geolgists to develop the geologic the scale?
Biologists
What kind of scientists worked with geologists to develop the geological time scale?
biologists
