By Jonathan Amos BBC Science Correspondent
Europe’s most active volcano, Mount Etna, is sliding towards the sea.
Scientists have established that the whole edifice on the Italian island of Sicily is edging in the direction of the Mediterranean at a rate of 14mm per year.
BBC News Online, March 24, 2018
An edifice is a building, usually a grand one, but always man-made, so you cannot apply it to a volcano. The best word I can think of to use here would be ‘formation’ but why not just call it a mountain? I don’t think the word ‘whole’ adds anything.