Dating techniques com
Applying ages to our cores is central to all the research we do.
If we don’t know how old our cores are, then all we have is a record of past changes without context or the ability to compare to other records.
Numerical techniques are best, but datable materials are often lacking, and in these cases age estimation must be made using relative-dating or correlation techniques.
Relative-dating techniques are nearly always applicable but are not precise and require calibration.
Correlation techniques are locally useful and depend on recognition of an event whose age is known, such as a volcanic eruption or a paleomagnetic reversal.
In general, the work we do covers a period in time known as the Holocene – this refers to approximately the past 11,500 years and is the period since the end of the last ice age.
There are many different techniques that can be used to date the peat – to apply an age to any given depth of a core.We can figure out ages pretty accurately, but none of the methods are perfect, so ages always have error associated with them.The amount of deformation can normally be measured with greater accuracy than the age.Adequate age control is thus a limiting factor in studies of active tectonism.
About 26 dating techniques can be applied to dating deposits and deformation of late Cenozoic age (past few million years).These techniques can be grouped as numerical, relative dating, and correlation.