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The Breadknife volcanic dyke

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The Breadknife


The Breadknife

The Breadknife is a volcanic dyke in New South Wales, Australia. It is nearly 850 metres high, but often is only 500 m wide, which is particularly rare. The Breadknife was part of a large shield volcano, that first erupted about 17 million years ago and stopped about 13 million years ago. A huge shield-shaped volcano formed as volcanic explosions occurred over millions of years. This shield volcano rose about 1,000 m and is now largely eroded, forming the Warrumbungles.[2] The Breadknife was formed when hot magma spread through a soft rock. When the magma solidified and became harder than the soft rock, erosion exposed a dyke.

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