From Jerry Clough:
Apropos of nothing in particular I noted that the Wikipedia article on what I call "stepping stones" is called "step-stone bridge".
I assumed that this was yet another Americanism, but I can't find it in dictionaries here, or any uses of this and related terms using Google ngrams. The useful reference on the Wikipedia article is a glossary of trail terms and only contains "stepping stones".
I wondered if you, or perhaps Language Log readers, could shed any light on what to me looks suspiciously like a neologism.