Abandoned fossil burrows dating back 330 million years - 100 million years before the appearance of dinosaurs - have been found in limestone rock on the coast of Doolin in Co Clare.

The burrows were discovered by Dr Eamon Doyle, geologist for the Burren and Cliffs of Moher UNESCO Global Geopark and Clare County Council.

Burrow fossils are the remains of burrows - holes or tunnels excavated into the ground or seafloor - by animals to create a space suitable for habitation, temporary refuge, or as a byproduct of movement preserved in the rock record.

Speaking on RTÉ's Morning Ireland, Dr Doyle said the series of burrows in the limestone look very much like what you would find in the Bahamas today, where you get shrimp borrowing just offshore.

The significance of the burrows "is that usually shrimp or shrimp-like creatures like that they're very soft, but they don't get preserved as fossils.

"So when we when we find fossils, we usually find the hard parts of them and they're the bits that are most likely to preserve.

"But shrimp and other creatures like that don't have many hard parts, so generally, and not just in Ireland, they're very rare," he explained.

Dr Doyle said these types of discoveries add to the overall picture of what kind of animals were living at that time.

"And that's really important to understand how the limestones evolved and the limestone, of course, is so important to the geology and the landscape of the Burren."

He said it adds to the story of the Burren and adds value to what people know about their geological heritage.