Replication in Plastic of Three-Dimensional Fossils Preserved in Indurated Clastic Sedimentary Rocks

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Science  29 Jun 1984:
Vol. 224, Issue 4656, pp. 1425-1427
DOI: 10.1126/science.224.4656.1425


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.