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Volcanic ash used dating fossils
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).
Geologic assessment of active tectonism depends on two key measures: the age and the amount of deformation of a given stratigraphic unit.
The amount of deformation can normally be measured with greater accuracy than the age.
These techniques can be grouped as numerical, relative dating, and correlation.