Some observations on swallow holes and mines in the Chalk

@article{West1972SomeOO,
  title={Some observations on swallow holes and mines in the Chalk},
  author={Graham West and Michael John Dumbleton},
  journal={Quarterly Journal of Engineering Geology},
  year={1972},
  volume={5},
  pages={171 - 177}
}
Summary The paper records some observations on swallow holes and mines in the Chalk and their effects on road construction, drawing examples from recent motorway construction for the M4 and M40 in Berkshire and Buckinghamshire. The forms and modes of origin of swallow holes are discussed and it is shown that percolation of rainwater can dissolve enough chalk to account for the formation of the smaller examples. Besides ground survey, air photographs are effective for locating swallow holes… Expand

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