It would appear they struck your fifth planet a bit harder than Earth, and it was much smaller and less geologically stable to begin with.

We should all live in central or southwest Queensland in Australia, which is geologically stable.

The amendments succeeded in compelling states to begin identifying geologically stable sites suitable for the new dumps.

Current disposal options favor burial in continental, geologically stable rock.

A good storage site is one that is geologically stable, and which has very low humidity.

Geologically stable - no active volcanoes, at least.

Hong Kong has been geologically stable for millions of years.

By contrast, the Jarnsaxa Flats were mirror smooth and geologically stable.

Salt beds were considered geologically stable and easy to mine, and had been thought to have no water circulating in them that would dissolve the salt.

Unlike Japan or the northern provinces of China, the Korean Peninsula is geologically stable.