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Feasibility of groundwater dating by CFCs was assessed comprehensively based on the concentrations of NO in the groundwater, because the CFCs would be degraded under the reduction condition available in a wetland.
They include amino acid racemization, useful in measuring shells and other bicarbonates between 500 and 300,000 years old, and obsidian hydration, used to measure natural glass between 500 to 200,000 years old.
These methods are not so useful in measuring the age of fossils and bones but they are useful in measuring the age of objects such as beads and shellfish eaten as food found with fossils and bones.
Therefore, it provides a cost-effective tool to understand the groundwater flow system.
Laboratory and field studies have consistently shown that CFCs are stable in the aerobic environments and their concentrations of groundwater can reflect atmospheric values at the time of recharge (Oster et al. Wetlands play an important role in climatic regulation, water conservation and purification, and the maintenance of biological diversity.