Resume of microfossils from upper Cretaceous flints and chalks of Europe
"Microscopic study of specially prepared samples of upper Cretaceous flints and chalks reveals the presence of remains or traces of organisms from unicellular plants to vertebrates."
United States Geological Survey, St. Petersburg, Florida. Chief Scientists: Jeff Williams, Jack Kindinger, Shea Penland. Data (navigation) of field activity MSTR88-1 (M-1-88-LA) in Louisiana Chandeleur from 08/01/1988 to 08/06/1988, http://walrus.wr.usgs.gov/infobank/m/m188la/html/m-1-88-la.meta.html.