Ireland was covered by shallow seas in which the marine reptiles ichthyosaurs and plesiosaurs lived, together with bony fishes and ammonites. Muds and sandstones were deposited. Today some Jurassic rocks can be seen along the Antrim coast; elsewhere they have been eroded away.

180 million years ago one large continent existed called Pangaea following the merger of Laurasia and Gondwana. However during the Jurassic the Atlantic Ocean began to open up and Gondwana and Laurasia started to drift apart. At this time Ireland was situated north of the Equator.

click on the prehistoric scenes