Answer: SHALES
SHALES is a crossword puzzle answer that we have spotted 10 times.
Referring Clues:
- Terrigenous rocks
- Synthetic fuel sources
- Fuel-yielding rocks
- Some are bituminous
- Fossil rocks
- Sedimentary rocks
- Oil-bearing rocks
- Some sedimentary rocks
- Sources of oil
- Fissile rocks
Last Seen In:
- LA Times - April 04, 2022
- LA Times - October 08, 2020
- New York Times - March 07, 2018
- Universal - February 07, 2017
- LA Times - June 14, 2016
- Canadiana - October 15, 2012
- New York Times - December 31, 2009
- King Syndicate - Premier Sunday - April 26, 2009
- LA Times - January 08, 2006
- New York Times - June 02, 2002
- Washington Post - January 26, 2001
- New York Times - April 20, 1997
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