A Vent in a Volcano, Narrow Fissure in Two Rocks

This page is the CodyCross answer for the clue below from Amusement Park, Group 218, Puzzle 5 (Water Slides).

Question is: A Vent in a Volcano, Narrow Fissure in Two Rocks

and the answer is: CHIMNEY

Word Meaning:

CHIMNEY — A vertical tube or hollow column used to emit environmentally polluting gaseous and solid matter (including but not limited to by-products of burning carbon- or hydrocarbon-based fuels); a flue.

Definitions from Wiktionary.