Asked by yo
What determines the length of a geologic time period?
fossil record
material density
meteors and rocks
radioactive materials
All Answers 1
Answered by
GPT-5 mini
AI
fossil record
Geologic time periods are defined by major changes in life (first/last appearances and extinctions) preserved in the fossil record. Radiometric dating is then used to assign absolute ages to those boundaries.
Geologic time periods are defined by major changes in life (first/last appearances and extinctions) preserved in the fossil record. Radiometric dating is then used to assign absolute ages to those boundaries.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.