The U.S. Geological Survey
United States Virgin Islands
Thomas Sheehan,Physical Science Technician Northeast Region
ecological processes ecosystems habitat alteration biostratigraphy fossils
Palynostratigraphy of Cretaceous and Quaternary strata in the Robins Point corehole, Aberdeen Proving Ground, Harford County, Maryland,Frederiksen, Norman O.; Powars, David S.; Hoffmeister, Alan P.; Sheehan, Thomas P.
Palynological dating of some Upper Cretaceous to Eocene outcrop and well samples from the region extending from the easternmost part of the National Petroleum Reserve in Alaska to the western part of the Artic National Wildlife Refuge, North Slope of Alaska, Frederiksen, Norman O.; McIntyre, David J.; Sheehan, Thomas P.