human
Write a detailed description of a risky scene outside a coastal area with sand ripples, basalt, and a sign.
assistant
At this end of the beach, a tall headland comprised of basalt, shale, and limestone rises up from the ocean, a thin strip of black sand disappearing around the far edge to the other side. Sand ripples are more pronounced here, giving a wavy texture to the fine black granules, resulting from the more violent waves crashing against the rocks. Near the last of the torches a sign warns of the danger near the cliff.