You can find it on Wikipedia.
To answer the real question you can find out be carbon dating the rocks.
An index fossil.
the relative age of the rock where it was found.
Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in. The age of formations is marked on a geologic calendar known as the geologic time scale. Development of the geologic time scale and dating of formations and rocks relies upon two fundamentally different ways of telling time: relative and absolute.
If the age of a certain rock strata is found by the use of isotopic methods and another nearby strata is found to contain trilobite fossils, assuming there is no unconformity between the two strata we can infer the approximate age of the trilobites within certain parameters.
Find out what era the Fossil was from and then you can put a relative date on the sedimentary rock, assuming that the fossil was preserved in the sedimentary rock when it had died. It would not be the actual age because you need to date the radioactive isotopes for that.
observing any changes in radioactivty. -JACKIELOPARDO
using radioactive elements
5-10 I think would be the age group.
the relative age of the rock where it was found.
i have no idea
An index fossil.
the relative age of the rock where it was found.
A Rock Breakage is a rock that breaks when its age is old. They can be found at the Trench where rocks re formed and rocks that are old
100 year old
100 year old
just turned 12
Geologists generally know the age of a rock by determining the age of the group of rocks, or formation, that it is found in. The age of formations is marked on a geologic calendar known as the geologic time scale. Development of the geologic time scale and dating of formations and rocks relies upon two fundamentally different ways of telling time: relative and absolute.