Geologic Time - Relative & Absolute Dating Crossword

This printable crossword puzzle on the topic of Rocks & Minerals has 12 clues. Answers range from 6 to 16 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

study of rock layers to determine geologic history
law stating that older rock layers are found at the bottom
the amount of time it takes for half an isotope to decay
an unstable isotope
a stable isotope
an atom of the same element that has a different number of neutrons in its nucleus and, therefore, a different mass
approximate age given to a rock layer based on it's position
an exact age given to a rock layer or fossil based on it's isotope decay
the decay of an isotope
column created to determine age of rocks and fossils
small pieces of eroded rock that is moved by wind or water,
the process by which wind, water, ice, gravity, or other natural forces move sediment over Earth's surface