Determining Age Crossword Puzzle

This printable crossword puzzle on the topic of Rocks & Minerals has 10 clues. Answers range from 3 to 23 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

indicates that one layer is older or younger than another layer, but does not indicate age in specific years
the rocks age is in specific years
helps determine relative age
helps find absolute age
how long it takes half the parents mass to convert to the daughter isotope.
the original radioactive isotope
the newly formed isoptope
parent isotope minus carbon dating
what does daughter isotope equal
one of the requirements for index fossils