How are tree rings use to date geologic events?

Question

How are tree rings use to date geologic events?

Answer 1

Toonces is correct on the one year for each ring scenario, but you need to remember that geological events are almost always measured in millions of years, and there aren't any trees that old. In other words, geologists do not use tree rings to date geologic events, but archeaologists and biologists would us them to measure other dates.

Answer 2

one year for each ring.