Relative dating rock quiz
Furthermore, useful fossils are either rare or totally absent in rocks from Precambrian time, which constitutes more than 87 percent of Earth history.
Precambrian rocks must therefore be correlated by means of precise isotopic dating.
Correlating two separated outcrops means establishing that they share certain characteristics indicative of contemporary formation.
The most useful indication of time equivalence is similar fossil content, provided of course that such remains are present.
Catastrophism says that the earth is very young, about 6,000 to 10,000 years old.
The grade for this chapter can come solely from the end of chapter test.
Geologists interpret the rocks of the earth based on their past history.
To examine the world we live in, we must expand our concept of what a long time period is.
Even thousands of years is inadequate..must think in terms of millions and billions of years.