Dating method determined numerical age earth
We can get absolute ages only if we have rocks from that surface.
For others, all we are doing is getting a relative age, using things like the formation of craters and other features on a surface.
It was only with the discovery of radioactivity that a new method giving an approximate age, with comparatively less chances of errors, was found.
The determination of the age of the earth was attempted through two distinct processes? Indirect methods for ascertaining the earth's age, and 2.
According to this method, there is an average rate of deposition of 30 cm of sediments in 755 years.
As such the beginning of Cambrian sedimentation come to about 510 million years.
We have rocks from the Moon (brought back), meteorites, and rocks that we know came from Mars.
We can then use radioactive age dating in order to date the ages of the surfaces (when the rocks first formed, i.e. We also have meteorites from asteroids and can date them, too.
Until recently geology relied extensively on the concept of the relative age of rocks.
These are the surfaces that we can get absolute ages for.
For the others, one can only use relative age dating (such as counting craters) in order to estimate the age of the surface and the history of the surface.
The discovery of numerical dating has supplemented relative dating techniques.
From the beginning of this course, we have stated that the Earth is about 4.6 billion years old.