BBC HomeExplore the BBC
This page has been archived and is no longer updated. Find out more about page archiving.
BBC Northern Ireland Education
KS3 Geography
Sustainable Development
goTourism Home goSite Map goGlossary goLinks
Arrivals Destinations Climate Pursuits Sustainability
Marble Arch Cave Formation Decision Time

Cave Formation
Image of rock formation
How were the Marble Arch Caves formed?

Over 300 million years ago, in the Carbiniferous period, Fermanagh was covered by a shallow, tropical ocean. Millions of shells of tiny sea creatures fell to the ocean floor after death. Compaction built up all these Calcium Carbonate shells into a 'blocky' rock called Carbiniferous Limestone.

Carbiniferous Limestone Continue

GoMarble ArchDecision TimeGo

About the BBC | Help | Terms of Use | Privacy & Cookies Policy