You have to date the volcanic layer above and below the fossil layer.
The age of the fossil will be an age range between the ages of the two volcanic layers. The diagram below shows a portion of the Geologic Time Scale.
This dating can be used on once-living items and can provide information on related spaces.
The two approaches are often complementary, as when a sequence of occurrences in one context can be correlated with an absolute chronlogy elsewhere.
Note that in the United States it is common to break the Carboniferous into two periods, the Pennsylvanian and the Mississippian, as is done in our museum. Andrew Mac Rae for the use of the time scale image and the short essay below.
Relative time - named subdivisions of the Earth's geology in a specific order (for example, the "Cambrian Period", followed by the "Ordovician Period", and "Silurian Period").
Radiocarbon dating has significantly changed humans’ approach to history during the last 50 years.
Three types of carbon occur naturally in living material: C12, C13 and C14.