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RI5 Planktonic Foraminifera and the Cretaceous-Tertiary Boundary in Central Delaware

RI5 Planktonic Foraminifera and the Cretaceous-Tertiary Boundary in Central Delaware
Publication Type:
Report of Investigation
Publication Date:
Feb 1962
Authors:
Jordan, R.R.
Abstract:

The uppermost Cretaceous and lowermost Tertiary planktonic Foraminifera obtained from cores taken in a deep well near Dover, Delaware are studied. The Cretaceous foraminifers are of the Heterohelix-Globotruncana assemblage and are probably of late Maescrichtian age. The Danian Globorotalia compressa - Globigerinoides daubjergensis zone lies immediately above. The Cretaceous-Tertiary boundary is at a depth of approximately
980 feet and lies within a gray, glauconitic silt.

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Please give proper credit to the Delaware Geological Survey.

Jordan, R.R., 1962, lanktonic Foraminifera and the Cretaceous-Tertiary Boundary in Central Delaware: Delaware Geological Survey Report of Investigation 5

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