Question

Geologists in the nineteenth century identified rock layers around the world and mapped them in chronological order (as seen above). Subsequently, which dating technique has been used extensively, permitting the boundaries between these geological periods to be dated accurately?

1) geomagnetic dating
2) spin electromagnetic resonance
3) radiometric dating
4) paleomagnetic dating

Answer 1

Geologists have used radiometric dating extensively to accurately date the boundaries between geological periods.

Step-by-step explanation:

Geologists have used a dating technique called radiometric dating extensively to accurately date the boundaries between geological periods. Radiometric dating is based on the decay of radioactive materials at a known rate and measures the amount of decay in rocks and fossils to determine their age. This method provides numerical ages for rocks and minerals, allowing geologists to establish precise chronological order.