noun
top of a massive rock
Refers to the summit or upper surface of a large rock or crag. Often used in literary or descriptive contexts.
岩頭に立って海を見渡した。
I stood on top of the massive rock and looked out over the sea.
Compound of 岩 (rock) and 頭 (head/top). The reading がんとう uses the on'yomi of both characters.