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Data sets Publications Expeditions Thesaurus
shale  search
BTsedimentary rocks
 .clastic rocks
 ..shale
UFbloating shale
 pelite
RTconstruction materials
 oil shale
 Eastern Gas Shales Project
 terrigenous materials
 argillaceous texture
 clays
 black shale
 torbanite
 slate deposits
 slates
SNDoes not include oil shale. Use clays for shale as brick clay.
shale oil  search
USEoil shale