Resumen de Paleogene Ostracode Faunas, Middle Atlantic Coastal Plain, U.S.A., and their Relationships to Sequence Stratigraphy
Distinctive ostracode faunas are recognizable in the Lower and Upper Paleocene, Lower, Middle, and Upper Eocene, and Upper Oligocene rocks of the Middle Atlantic coastal plain, U.S.A. The Paleogene physical stratigraphy of the region supports recognition of three unconformitybound "sequences" These are: (1) Aquia-Beaufort-Black Mingo sequences, Paleocene and Lower Eocene; (2) Castle Hayne-Santee sequence, Middle and Upper Eocene; and (3) River Bend-Upper Cooper sequence, Upper Oligocene. Several parasequences are recognizable in sequences 1 and 2. A distinctive ostracode fauna is each of three parasequences of the Aquia-Beaufort-Black Mingo sequence. The Castle Hayne-Santee sequences is represented by at least one ostracode fauna and the Lower Cooper portion of the upper part of this sequence has a second ostracode fauna. It appears that the formation-and member-rank "sequence" and "parasequences" in the Paleogene of the Middle Atlantic coastal plain, U.S.A. Are recognizable in part by their contained ostracode faunas, in addition to other attributes. Thus, knowledge of the faunas aids in the definition and lateral tracing of the sequences and parasequences.
