From King Dictionary of Contemporary English
Related topics: Geology
bedrockbed‧rock /ˈbedrɒk $ -rɑːk/ noun 1 BASIC[singular] the basic ideas, features, or facts on which something is based Marriage and children are the bedrock of family life.see thesaurus at basis2 HEG[uncountable] solid rock in the ground below soil or sand
Examples from the Corpus
bedrockIn fact, some of the footings had rested on soil, not bedrock.Some bedrock mineralisation has been found.Facts are the bedrock of any trial.They form the bedrock of our economic planet.All of the land swept by the floods was stripped absolutely to bedrock.The interface between weathered material and unweathered bedrock is known as the weathering front.