There has been previous evidence of Mars' geologic activity.

The area clearly had a history of intense geologic activity.

The moon has no known past or present geologic activity, and its surface is dominated by impact craters.

So, while animal life bloomed on Earth, the Moon's geologic activity was coming to an end.

Rough weather and geologic activity mean Earth has relatively few cosmic scars.

"The whole country is shifting like a big mountain with some sort of geologic activity pushing up from inside it," Delia explains.

Indeed, much geologic activity that substantially changes the crustal portions of the earth is catastrophic.

Seismographs are used to monitor vibration of the structural elements due to geologic activity.

The township has seen lots of unusual geologic activity since September 20, 2010.

The dark band towards the upper third is tilted and broken, showing the intense geologic activity from the past.