/ Whats the difference between....
Do you mean shake hole rather than sink hole? I can't see any sink holes on the OS 1:25k maps around Malham. There are plenty of shake holes, though: these are depressions or pits in the ground, caused by underground collapses, whereas pot holes are open shafts. There is also the occasional swallow hole, which is where a stream disappears underground. Does that help?
A pothole however would usually be something pretty obvious and often spectacular (and not necessarily taking a stream in)
So, a sink hole could be a pothole (or not) and a pothole can be a sink hole (or not). Not all potholes are sink holes (and vice versa). Hope that makes sense. Now a shakehole ........
OS define a sinkhole as "A Sink Hole is an area where water often from a stream, collects forming a bog, marsh or pool and then disappears underground."
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