StratumIn geology and related fields, a stratum (plural: strata) is a layer of rock or soil with internally consistent characteristics that distinguishes it from contiguous layers. The stratum is the unit that forms the basis of the study of stratigraphy. |
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"I think 'Hail to the Chief' has a nice ring to it." - John F. Kennedy (1917-1963) when asked what is his favorite song |
