The Bristol Coalfield is a geologically complex coalfield in the west of England.

It has not been affected by ocean spreading as much as its neighbor, and is therefore not quite as geologically complex.

Located at the center of both a geological hotspot and a mid-ocean ridge, the seamount is geologically complex, and its origins are still poorly understood.

The geologically complex mini-mountain of Cribarth also lies on the Disturbance and indeed gives its name to the feature.

The lagoon is located within the geologically complex Marin Headlands and fills a valley drowned by recent sea level rise following the last glacial period.

The geologically complex surfaces once again give one the feeling of being high above the Earth, looking down on sunbaked deserts and canyons.

The New York City area is part of the geologically complex structure of the Northern Appalachian Mountains.

This is a geologically complex area of clays, limstone and marl.

To its west in the northern hemisphere was an upraised geologically complex region that he had named the Western Hyrrokkin Uplands.

The collapse occurred because of heavy overbreak (during excavation) at a geologically complex area inside the tunnel and delayed the completion of the south-bound tunnel.