Tritium dating and carbon dating are used to age date which medium?

Tritium dating and carbon dating are used to age date which medium?

• A. Igneous rocks
• B. Groundwater
• C. Sedimentary layers
• D. Atmosphere

Answer: (B)

Groundwater is the medium being dated. Tritium dating relies on the short half-life of tritium and its introduction into the hydrologic cycle from atmospheric nuclear testing in the mid-20th century. By measuring tritium in groundwater, you can estimate how long ago the water recharged the aquifer, making it useful for dating relatively young groundwater. Carbon-14 dating targets carbon in organic matter and can be applied to dissolved carbon in groundwater, but this approach is more complex due to exchange processes with soils and CO2. In practice, tritium provides a clear, practical age signal for groundwater, whereas dating rocks or sediments uses different isotopic systems, and the atmosphere isn’t dated as a solitary medium here.

Groundwater is the medium being dated. Tritium dating relies on the short half-life of tritium and its introduction into the hydrologic cycle from atmospheric nuclear testing in the mid-20th century. By measuring tritium in groundwater, you can estimate how long ago the water recharged the aquifer, making it useful for dating relatively young groundwater. Carbon-14 dating targets carbon in organic matter and can be applied to dissolved carbon in groundwater, but this approach is more complex due to exchange processes with soils and CO2. In practice, tritium provides a clear, practical age signal for groundwater, whereas dating rocks or sediments uses different isotopic systems, and the atmosphere isn’t dated as a solitary medium here.