Highland

When Were Highlands Formed?

The chain of volcanic islands collided with the Grampian Grampian about 480–460 million years ago. This is called the Grampian Event. Baltica collided with the Northern Highlands about 440 million years ago, pushing together the Northern Highlands and North-west Seaboard. This is called the Scandian Event. What highland region is the oldest when were they …

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