Cretaceous-Tertiary Boundary in New Jersey, Delaware, and Eastern Maryland
By James P. Minard, James Patrick Owens, James Pierson Minard, Geological Survey (U.S.), Norman Frederick Sohl
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The basal Tertiary Hornerstown Sand unconformably overlaps progressively lower truncated beds in the underlying Cretaceous section southwestward through New Jersey, Delaware, and eastern Maryland.