mikem said:
There are caves in Patagonia (which is about 300 miles away)
But the geology is quite different in Patagonia and the area containing caves is part of the Andean Chain which follows the western side of the continent of South America; in Patagonia it appears very similar to the rock towers in northern Italy which make up the climbing/skiing region, which is sedimentary rock. The Falkland Islands are part of the eastern continental shelf of the southern part of South America.
I wonder, does somewhere like BGS have a geological map of the Falklands?