Natural Fuel Produced From Fine Sedimentary Rock
This page is the CodyCross answer for the clue below from House of Horrors, Group 1108, Puzzle 1 (Creaky Stairs).
Question is: Natural Fuel Produced From Fine Sedimentary Rock
and the answer is: SHALEGAS
Word Meaning:
SHALE GAS — Natural gas extracted from shale.
Definitions from Wiktionary.