title: Replication in plastic of three-dimensional fossils preserved in indurated clastic sedimentary rocks.
abstract: A new technique for replicating in plastic the fossils preserved in clastic rocks should now make available reliable morphologic and frequency data, comparable in quality to those derived from acid-prepared silicified faunas, for a major segment of the fossil record. The technique involves three steps: the dissolution of carbonate in fossiliferous rocks with hydrochloric acid, impregnation of resulting voids with liquid plastic, and dissolution of the rock matrix with hydrofluoric acid, leaving a concentrate of plastic-replaced fossils.
authors.forename: H T
authors.initials: HT
authors.lastname: Zapasnik
authors.forename: P A
authors.initials: PA
authors.lastname: Johnston