Associate Professor Emeritus
Department of Geology
University of Maryland
College Park, Maryland 20742, USA
Tel: (301) 405-4078
Fax: (301) 314-9661 
stifel@friend.ly.net

Research Interests
Paleontology, paleobiology, biostratigraphy of mid-Atlantic Phanerozoic rocks; ontogenetic studies; mulluscan paleoecology, Tertiary otoliths and trace fossil studies.