How do scientists measure the age of rocks at mid-ocean ridges?
A) radioactive dating methods
B) comparison of rock samples on mountain ranges
C) fossil stratification and the principle of horizontality
D) magnetic polarity measurements

Question

Quizplus · Accepted Answer

Scientists measure the age of rocks at mid-ocean ridges using magnetic polarity measurements. As new oceanic crust is formed at the ridges, it records the direction of Earth's magnetic field at the time of its formation. By analyzing the magnetic polarity of rock samples taken from different ages along the ridge, scientists can create a timeline of magnetic reversals and determine the age of the rocks.

How Do Scientists Measure the Age of Rocks at Mid-Ocean