Potassium-argon dating can be used to date which fields?

Potassium-argon dating can be used to date which fields?

• A. Fossil dating
• B. Meteorites only
• C. Geochronology and archaeology
• D. Radiocarbon dating of living material

Answer: (C)

Potassium-argon dating hinges on the decay of potassium-40 to argon-40 and is best applied to solidified volcanic rocks and ash layers. Once a rock material solidifies, argon is trapped, and the increasing amount of argon-40 records the time elapsed since solidification. This makes the method ideal for establishing the ages of geological events, i.e., geochronology, and it can be applied in archaeology when volcanic layers or tephra are present at a site to constrain its chronology. It cannot date living material or direct fossils, which are dated by radiocarbon or other methods, and while it can date some meteorites, its primary use is broad, not limited to meteorites. Therefore, the best fit is dating within geochronology and archaeology.

Potassium-argon dating hinges on the decay of potassium-40 to argon-40 and is best applied to solidified volcanic rocks and ash layers. Once a rock material solidifies, argon is trapped, and the increasing amount of argon-40 records the time elapsed since solidification. This makes the method ideal for establishing the ages of geological events, i.e., geochronology, and it can be applied in archaeology when volcanic layers or tephra are present at a site to constrain its chronology. It cannot date living material or direct fossils, which are dated by radiocarbon or other methods, and while it can date some meteorites, its primary use is broad, not limited to meteorites. Therefore, the best fit is dating within geochronology and archaeology.