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.
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 ,
Delaware Geological Survey
University of Delaware
Delaware Geological Survey Building
Newark, DE 19716
Mon - Fri; 8:00am to 4:30pm