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The basic rule of geologic age is the law of superposition. This states that the most geologic recent layers are those at the top, the oldest at the bottom. Additionally, index fossils, those of rapidly evolving organisms, can be correlated to a specific range of geologic time. The rate of radioactive decay in certain elements is also used to determine an accurate age of material. Additionally, some degree of dating or rocks is made by the magnetic orientation of certain magnetic minerals they contain, which correlates with the magnetic orientation of the Earth at the time of their creation.
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How do the principles of stratigraphic help geologist understand the earths past?
Derek is a shhlut
What principles account for earths history?
The main principle linked to the palaeoenvironment of the Earth (ie the Earths past) is called the principle of uniformitarianism: "The present is the key to the past" This means that all processes which occur on Earth at the present day, ie erosion, transportation, deposition, weathering, metamorphism etc. also occured at any point in the Earth's history in exactly the same way. Hope this helps :)
Why are fossils important to earths history as a planet?
Fossils aren't but the life that made them is.
Which part of earths history is shown by analysis of ice cores?
Changes in climate
What does a proportional time scale show?
how different parts of earths history compare to the whole world
What are two ways that scientists can study earths climates history?
What are two ways that's scientists can study earths climates history
How do the principles of stratigraphic help geologist understand the earths past?
Derek is a shhlut
What principles account for earths history?
The main principle linked to the palaeoenvironment of the Earth (ie the Earths past) is called the principle of uniformitarianism: "The present is the key to the past" This means that all processes which occur on Earth at the present day, ie erosion, transportation, deposition, weathering, metamorphism etc. also occured at any point in the Earth's history in exactly the same way. Hope this helps :)
What is the smallest division of the earths history?
epoch
Most of earths history is recorded where?
In sedimentary rock.
What is the study of earths history called?
Historical geology.
What was earths atmosphere oceans and continents began to form during a period of earths history called?
precambrian era
What is the name of earths outer layer?
The crust is the top layer we live on, followed by the mantle and then the core.
What does the grand canyon show us about the earths history?
to die
Why is earths history divided into eras epochs eons?
because
Which of earths layer has is thinnest?
The crust is the thinnest, followed by the outer core, inner core, and the mantle is the thickest.
What are two ways that scientists can study earths climate history?
helller
