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14 results for SHALES

4 Shortz Era entries found. Click any date for context.
See the dictionary definition for SHALES.

Wed Mar 7, 201844DSources of oilNatan Last, Andy Kravis and the J.A.S.A. Crossword Class
Thu Dec 31, 200952DSome are bituminousFrank Longo
Sun Jun 2, 200291DSynthetic fuel sourcesFrank Longo
Sun Apr 20, 199722ATerrigenous rocksCharles M. Deber

10 results for SHALES from older pre-Shortz puzzles.

Sun Jun 3, 197950DOil-producing rocksBert H. KruseMaleska
Tue Jan 3, 197843DFissile rocksH. Hastings ReddallMaleska
Sun Oct 24, 197679DLayered rocksJohn WilligWeng
Thu Sep 26, 197442AFissile rocksAnthony B. CanningWeng
Sun Apr 8, 197348AFissile rocksRonald HirschfeldWeng
Thu Jun 21, 195615DFine-grained rocks.Sidney LambertFarrar
Wed May 23, 195645AFissile rocks.S. A. KayFarrar
Sun May 9, 195474AFine-grained rocks.Sidney LambertFarrar
Sun May 14, 1950108DLayers of rock.Jack LuzzattoFarrar
Sun Jan 16, 194982DFissile rocks.Harold T. BersFarrar