How was macdui formed?

Macdui, the second-highest mountain in the Cairngorms of Scotland, was formed through a combination of geological processes, primarily during the Caledonian Orogeny around 400 million years ago. It is composed mainly of granite, which was shaped by glacial erosion during the last Ice Age, resulting in its distinctive rugged terrain and summit plateau. The mountain's current landscape features, including its corries and steep cliffs, were also influenced by ongoing weathering and erosion. Today, Macdui stands as a prominent feature in the Scottish Highlands, showcasing the interplay of geological forces over millions of years.