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13 results for SHALES

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

DateGridClueAuthor
Thursday, December 31, 200952DSome are bituminousFrank Longo
Sunday, June 2, 200291DSynthetic fuel sourcesFrank Longo
Sunday, April 20, 199722ATerrigenous rocksCharles M. Deber

10 results for SHALES from older pre-Shortz puzzles.

DateGridClueAuthorEditor
Sunday, June 3, 197950DOil-producing rocksBert H. KruseMaleska
Tuesday, January 3, 197843DFissile rocksH. Hastings ReddallMaleska
Sunday, October 24, 197679DLayered rocksJohn WilligWeng
Thursday, September 26, 197442AFissile rocksAnthony B. CanningWeng
Sunday, April 8, 197348AFissile rocksRonald HirschfeldWeng
Thursday, June 21, 195615DFine-grained rocks.Sidney LambertFarrar
Wednesday, May 23, 195645AFissile rocks.S. A. KayFarrar
Sunday, May 9, 195474AFine-grained rocks.Sidney LambertFarrar
Sunday, May 14, 1950108DLayers of rock.Jack LuzzattoFarrar
Sunday, January 16, 194982DFissile rocks.Harold T. BersFarrar