Some geological activity is still taking place on Mars.

This may indicate a renewal mechanism on the surface and geological activity.

"If danger of geological activity exists, surely escape routes would have been established."

There have been some closings of the tunnel due to unstable geological activities.

All boundaries except the conservative ones are sites of major geological activity.

These are considered to have formed through geological activity.

This causes all the geological activity at the Valley.

Therefore, a very low level of geological activity today cannot quite be ruled out.

Often a rift will form in an area of the crust that is already weakened by earlier geological activity.

But there was the usual geological activity, and the plain subsided on us.