Radiometric dates from closed systems are more accurate that from open rock systems.

Question

Quizplus · Accepted Answer

Radiometric dating relies on the assumption that the system has remained closed, meaning that the isotopic composition has not been altered by external processes such as diffusion or contamination. In closed systems, this assumption is more likely to be valid, leading to more accurate age determinations. Open systems, where materials can move in and out, may have altered isotopic compositions, making the dating less reliable.

Radiometric Dates from Closed Systems Are More Accurate That from Open