Because of the underlying geology of the area, a large-scale collapse is all the more possible.

A combination of underlying geology and low elevation make these sites extremely vulnerable to coastal erosion.

The purpose of the survey is to assess the sea-bed and underlying geology for suitability, or not, for pipe laying.

That's the thing about this country; the underlying geology is so complex that it seems like it changes every dozen miles or so.

Writing in the journal Quaternary Science Reviews, they said the underlying geology of the region shows a very large and widespread quake is possible.