I don’t mean that he had traded on his phantom millions, but he had deliberately given Daisy a sense of security; he let her believe that he was a person from much the same stratum as herself — that he was fully able to take care of her.
There are no more uses of "strata" in the book.
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The candidate reaches across social strata — from millionaires to the unemployed.
Re-orientation of rock strata occurs principally due to tectonic forces.