Maybe it can be seen as a =fountain ? Mostly commonly decorative “waterfalls” indoors, especially a curtain-like “water wall”. Some outdoors.
15 =fountain + https://taginfo.openstreetmap.org/tags/fountain=waterfall somehow. There’s ~170 fountain=nozzle used alone to show each discharge point of a =fountain , if you see each “rock formation” as 1 “fountain” with water coming down from each side.