Basaltic clasts within a conglomerate have been radiometrically dated to 50 million years ago.Is this a reliable age for the conglomerate?
A) Yes.
B) No,this age is likely too old.
C) No,this age is likely too young.
D) No,basalt never contains minerals bearing radioactive isotopes.

Question

Quizplus · Accepted Answer

The age of the basaltic clasts gives a maximum age for the conglomerate, as the clasts must have existed before they were incorporated into the conglomerate. Therefore, the conglomerate itself could be younger, making the age likely too old for the conglomerate itself.

Basaltic Clasts Within a Conglomerate Have Been Radiometrically Dated to 50