On Thu, 15 Aug 2019 at 12:41, ael <witwa...@disroot.org> wrote: > > I was going to comment that a beach has to meet the water at the same > level. That is maybe sort of implied above? As opposed to a cliff or > even wall. >
With a cliff the high water and low water marks would be coincident, or very nearly so. Unless there is at least enough space for somebody to stand between high- and low-water marks, it can't be a beach. I am not sure that a beach is required to have a "significant" slope. > Obviously it must have some non-zero slope, otherwise it will be covered > by the water (to a first approximation). But on reflection, even that > may not be true for some sections of a beach. Portions that may be > exposed at low tide could even have a negative slope, and still be a > (hazardous) beach. > I wouldn't say a slope is required, just that in the real world there will be a slope. The point I think was trying to be made is that the slope isn't vertical or so steep that it's difficult to walk on. But I could be wrong. -- Paul
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