Word: stratas
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Dates: during 1920-1929
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...that in time the pool is entirely flooded and must be abandoned. Many pools in Oklahoma, Kansas, Ohio and elsewhere were doomed to early decline from this cause, and the present more serious decline of the Mexican fields arises in a similar manner. While not all oil-bearing strata contain salt water, the majority of them do; and where the strata (or "sands") are in the nature of limestone instead of being a true sand or sandstone stratum, the decline is very much greater than otherwise...
...social discipline only toward which this principle works; that is the negative side. A sense of cooperative responsibility is sought. Curiously this instinct is higher in the criminal than in the so-called upper strata of society. At any rate a warped form of it known as loyalty to the gang is all-important among this class, while the tendency is all towards individualism in modern society...