A vertical sequence of strata is called a...
A younger sequence truncating an older sequence is an example of a:
After two half-lives the number of parent atoms will be reduced to only what percentage of the original number.
Modern estimates of the age of the Earth are based on the age of:
The oldest rocks found.
The oldest minerals found.
The oldest fossils found.
Individual rock layers can be correlated from one place to another by:
their grain size.
the principle of superposition.
I'm 99% sure the first one's stratigraphic column.
dont kno the second one
the third is deffinetely 25%
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