No Dinosaur Fossils In Ireland?

One of the puzzling questions that we get asked when we get emailed or written to by people from the “Emerald Isle” is why there are no dinosaur fossils in Ireland?  Today, being St. Patrick’s day, seems an appropriate date in the calendar to tackle this issue.  Most people are familiar with the story of St. Patrick banishing all snakes (serpents) from Ireland.  The story has passed into legend as much of the life and works of this former slave is unknown.  Even the dates of when he lived are debated (around 400 AD), although some accounts relate that this pious man lived until he was over 100 years old.

The story regarding the serpents being driven out of Ireland may be more symbolic than factual.  Scientists are fairly certain that there were no snakes present in post glacial Ireland and the “serpents” referred to may actually be a reference to heathen druids who were banished by St. Patrick.  However, we do get asked by dinosaur fans, why when there are lots of dinosaur fossils in England, there are virtually none in Ireland.

This is quite a complex problem.  It is true that the geology of Ireland and the United Kingdom is similar and indeed these land masses have been proximal to each other for a large part of geological history.  However, it is really a question relating to the types of exposed strata in Ireland compared to the rest of the British Isles.  There are many sites in Ireland where fossils can be found, but these are mainly invertebrate or plant remains dating from the Palaeozoic.  This is true for the rest of the British Isles, vertebrate fossils are much rarer.  However, in southern and eastern England sedimentary strata from the Mesozoic is exposed and this has led to the discovery of a number of different dinosaur genera in England, with dinosaur fossils being found in the exposed clay, sandstones and limestones.

The geology of Ireland is much more similar to the adjacent rocks of Scotland and northern England where very few outcrops of Mesozoic rocks occur.  In Northern Ireland there are many outcrops of highly metamorphosed rocks with most of the fossils that these rocks may have contained being destroyed as the rocks changed and buckled under heat and pressure.  There is also a substantial amount of volcanic igneous rock exposed, such as the 65 million year old “Giants Causeway” that can be seen on the coast of Northern Ireland.  The dominant rock formations in terms of exposed area date from the Carboniferous, many millions of years before Dinosauria.  However, in exposed limestones, shales and sandstone fish fossils, plants and invertebrate fossils can be located.

There are some dinosaur fossils associated with Ireland.  One of our team members recalls reading about a set of dinosaur footprints that had been found and some early Jurassic dinosaur bones that had been discovered in County Antrim.  For much of the Mesozoic, Ireland was underwater so the only dinosaur fossils that could be found are those animals unfortunate to have been washed out to sea and deposited in marine strata (similar fashion to Dorset Scelidosaurus).

Scelidosaurus – A Potential Dinosaur From Ireland

Picture Credit: Everything Dinosaur

To view a scale model of Scelidosaurus and other dinosaur models: Dinosaur Toys for Girls and Boys – Dinosaur Models and Dinosaur Toys

Ichthyosaur and Plesiosaur fossils have been found in northern Ireland, again from exposed strata on the coast of County Antrim, although articulated fossil elements are extremely rare.

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