When will a fossil be used in finding the absolute age of rocks? (1 point)
if it existed for a limited period of time and in a small area
if it existed for a limited period of time and in a wide area
• if it existed for a long period of time and in a wide area
• if it existed for a long period of time and in a small area
Fossils that are useful in finding the absolute age of rocks are typically those that existed for a limited period of time and in a wide area. These are known as 'index fossils' or 'indicator species,' and they help geologists correlate the age of rock layers across different regions. Because these organisms were widespread and only lived for a relatively short geological time frame, their presence in rock layers indicates a specific period in geologic history, thus assisting in dating the rocks. Therefore, the correct answer is:
if it existed for a limited period of time and in a wide area