The rocky shore at Santon Gorge, Isle of Man, looking along the coast
Manx Geological Survey

Exploring the rocks of the Isle of Man

The geology of the Isle of Man

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How the Island was made

The geology of the Isle of Man provides a fascinating insight into 500 million years of Earth’s history. The Island is only a small remnant of a once mighty mountain range formed when the continents of Europe and North America collided. Prior to that the area lay in an ocean thousands of kilometres south of the equator at a water depth of several hundred metres. Over time the area drifted northwards, experiencing as it went huge variations in sea level and climate, such that at one time desert conditions prevailed whilst at another it was part of a shallow tropical sea. On the way to becoming the Manx landscape we recognise today, it has been split by earthquakes, ignited by volcanoes, smothered by ice and exploited by man.

News and papers

From the Survey

  • A group of people on the shore at Niarbyl

    A field tour at Niarbyl

    The Survey took part in the Isle of Man Heritage Open Days, run by Manx National Heritage, with a geological field tour for the public at Niarbyl, Dalby.

  • Children gathered round a table of experiments

    Experiments for young antiquarians

    Members of the Survey have performed geological experiments for the young antiquarians of the Isle of Man Natural History and Antiquarian Society.

  • Folded rock on Peel Hill

    Geology photographs

    Folds and faults, sedimentary rocks and structures, fossils and igneous rocks.

  • What did the Isle of Man look like hundreds of millions of years ago?

    Over 500 million years the Island has been assembled like a giant 3D jigsaw puzzle from different pieces of continents, broken apart again by earthquakes and intruded by molten rock. Watch it form in three animations with audio commentary.

  • Manx Group fossils

    Subtle variations in fossil shapes due to the effects of evolution have been crucial in telling us the age of the Manx Group.

  • G. W. Lamplugh

    Lamplugh produced some of the most important geological research on the Isle of Man. Working between 1892 and 1897, he made the first official geological map of the Island.