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The stacks themselves are no more than thousands of years old, from (geologically speaking) very recent marine erosion. Significant changes to Old Harry Rock have been made within the last 100 years.

The rock itself (chalk) is Cretaceous so over 65 million years old.

The upland from which they are being eroded is of Tertiary age, so younger.

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9y ago
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14y ago

They are made of chalk, with some bands of flint.

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14y ago

it is nearly 40ft tall

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Anonymous

Lvl 1
3y ago

25 feet tall

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Q: How tall are the old harry rocks?
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What are the stages of old harry rocks?

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How far is it from old harry rocks to anvil point and how long does it take to walk from old harry to anvil point?

Roughly 6.5 km


How did old harry rocks get its name?

· Old Harry was the first one to climb the rock so they called it Old Harry· The devil was known as Old Harry and he slept on the rock· The rock was named after Harry Paye, an infamous Poole pirate, who stored his contraband nearby.Old Harry was a well known Pirate around the area. It was simply named after him.


Why is the rock named old harry?

Old harry was a stack. Old harry was an old man who drove his ships in. His wife every night stood on the end of the rock holding a lamp out so Old Harry wouldn't crash his boat. One night old harry went out in his boat and his wife was in the pub. Old Harry's wife was drunk and was walking out along the stacks and fell off and died. Along came old harry in his boat and because there was no lamp he crashed his boat in to a millions of pieces and he died to. So that is how Old Harry the stack got its name.


How old is Old Harry Rocks?

The Old Harry Rocks are part of a chalk band that is around 65 million years old. But the rock band has only been submerged by the sea in the last few thousand years. The current rocks known as Old Harry and his wife are a few centuries old, with Harry's original "wife" having collapsed in 1509. The 65Ma event was the KT Boundary, the end of the Cretaceous during which the chalk was formed. The subsequent uplift that formed the uplands from that Chalk was in the Tertiary, which followed the Cretaceous. The stacks themselves are no more than thousands of years old, as the Dorset coast retreated by marine erosion in the sea-level rise following the last Ice Age. The Old Harry rocks are simply stacks left by erosion of the chalk cliff in Purbeck, which extends under the sea all the way to the Needles on the Isle of Wight.