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Does anyone know what this geologic formation is called? I realize its a fantasy image, but I'm looking for the name of a real formation that closely resembles this, and I'll expand: a formation in the side of a coastal cliff, that is very deep and narrow, like a chasm-sea cave... Is it a geo/gio, or a fjord, or something else? And is something this extreme-- so narrow and so tall- realistic/possible in actual life?
Thanks for your help!