They're mostly old volcanoes some are still active but so pointy there wouldn't be much for a berg to catch on until it was right on top of them.
https://upload.wikimedia.org/wikipedia/commons/8/8e/British_...
They're mostly old volcanoes some are still active but so pointy there wouldn't be much for a berg to catch on until it was right on top of them.
https://upload.wikimedia.org/wikipedia/commons/8/8e/British_...