[ROUND BEACH STONE][1]Can anyone help determine how long it would have taken to turn this rock into the ball it is now? heavy density .Found on the South Coast here in the UK near Lyme Regis (Jurassic Coastal area)

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    $\begingroup$ to get an answer to this you need to tell what type of rock this is and the hardness,it is very hard to answer this question as the size and shape of the original rock is unknown,there is a lot of unknown factors that can influence the time it takes for this to form. $\endgroup$ – trond hansen Apr 20 at 6:37

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