noun
end moraine; terminal moraine
Geological term for a ridge of debris deposited at the furthest point reached by a glacier.
この谷の終堆石は、かつて氷河がここまで広がっていたことを示している。
The end moraine in this valley shows that a glacier once extended to this point.
Compound of 終 (end) + 堆石 (moraine). The exact derivation is uncertain; the spelling is conventionally associated with the meaning.