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Caledonian Orogeny
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Caledonian orogeny
The
Caledonian orogeny
was a
mountain building era
recorded in the northern parts of
Ireland
and
Britain
, the
Scandinavian Mountains
,
Svalbard
,
eastern Greenland
and parts of north-central Europe. The Caledonian orogeny encompasses events that occurred from the
Ordovician
to Early
Devonian
, roughly 490–390 million years ago (
Ma
). It was caused by the closure of the
Iapetus Ocean
when the continents and
terranes
of
Laurentia
,
Baltica
and
Avalonia
collided.
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