A Block Used to Line a Furnace
This page is the CodyCross answer for the clue below from Prehistory, Group 1247, Puzzle 2 (Rock Art of Alta).
Question is: A Block Used to Line a Furnace
and the answer is: FIREBRICK
Word Meaning:
FIREBRICK — a brick capable of withstanding high temperatures without deforming.
Definitions from Wiktionary.