Jordan, R.R.2007-08-062007-08-061962-02http://udspace.udel.edu/handle/19716/2796The 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.en-USPlanktonicForaminiferaCretaceous-TertiaryCentral DelawareTechnical Report