rocking stone

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rocking stone

[′räk·iŋ ‚stōn]
(geology)
A stone or boulder, often of great size, so finely poised upon its foundation (as on the side of a hill or cliff) that it can be moved slightly backward and forward with little force (as with the hand) and still retain its original position. Also known as roggan.
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References in periodicals archive ?
(tmc050711sofa) * HOW ODD: Stone Age flint knappers, rogue quarry workers, vandals dynamiting rocking stones off their perches and a mysterious band of carvers have left their marks on West Nab, above Meltham.
For Richard and Imogen, who are moving to Nottingham because of work commitments, the sale of their Rocking Stones home is a sad one.
The house at Rocking Stones comprises of two reception rooms and a downstairs bedroom, with two further bedrooms and a bathroom upstairs.
DECISIONS by Kirklees on Colne Valley planning applications: Conditional permission: R Hoyle, two-storey and single-storey extensions and formation of basement garage at 8 Rocking Stones, Quebec Road, Pole Moor.