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The optimal acetate buffered acetic acid technique for extracting phosphatic fossils

Published online by Cambridge University Press:  14 July 2015

Lennart Jeppsson ,
Rikard Anehus  and
Doris Fredholm
Lennart Jeppsson
Affiliation:
Department of Geology, Sölvegatan 13, SE-223 62 Lund, Sweden, Fax: +46-46 12 14 77
Rikard Anehus
Affiliation:
Department of Geology, Sölvegatan 13, SE-223 62 Lund, Sweden, Fax: +46-46 12 14 77
Doris Fredholm
Affiliation:
Department of Geology, Sölvegatan 13, SE-223 62 Lund, Sweden, Fax: +46-46 12 14 77
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Abstract

When extracting or cleaning phosphatic fossils using acetic acid, the solutions must be buffered with calcium acetate to a pH greater than 3.6 for conodont and many fish taxa, and to a slightly greater pH for some conulariid, shark, and some fish taxa. Diagrams of the changes in pH and density during dissolution, rate of dissolution, and productivity per liter of acid provide a means for selecting the economically optimal process, monitoring the progress, and adjusting the composition of the solution when necessary.

Type
Research Article
Information
Journal of Paleontology , Volume 73 , Issue 5 , September 1999 , pp. 964 - 972
Copyright
Copyright © The Paleontological Society 

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References

Barnes, C. R., Fredholm, D., and Jeppsson, L. 1987. Improved technique for picking of microfossils, p. 55, 74-76. In Austin, R. L. (ed.), Conodonts: Investigative Techniques and Applications. Ellis Horwood Ltd., Chichester, England.Google Scholar
Graves, R. W., and Ellison, S. 1941. Ordovician conodonts of the Marathon Basin, Texas. Missouri University, School of Mines and Metallurgy, Bulletin Technical Series, 14(2):1–26.Google Scholar
Jeppsson, L. 1987. Some thoughts about future improvements in conodont extraction methods, p. 35, 45-51, 52, 53. In Austin, R. L. (ed.), Conodonts: Investigative Techniques and Applications. Ellis Horwood Ltd., Chichester, England.Google Scholar
Jeppsson, L., and Anehus, R. 1995. A buffered formic acid technique for conodont extraction. Journal of Paleontology, 69:790–794.CrossRefGoogle Scholar
Jeppsson, L., and Anehus, R. 1999. A new technique to separate conodont elements from heavier minerals. Alcheringia, 23:57–62.CrossRefGoogle Scholar
Jeppsson, L., Fredholm, D., and Mattiasson, B. 1985. Acetic acid and phosphatic fossils—a warning. Journal of Paleontology, 59:952–956.Google Scholar
Jerre, F. 1994. Anatomy and phylogenetic significance of Eoconularia loculata, a conulariid from the Silurian of Gotland. Lethaia, 27:97–109.CrossRefGoogle Scholar
Mawson, R. 1987. Documentation of conodont assemblages across the Early Devonian-Middle Devonian Boundary, Broken River Formation, North Queensland, Australia. Courier Forschungsinstitut Senckenberg, 92:251–273.Google Scholar
Rixon, A. E. 1976. Fossil Animal Remains, their Preparation and Conservation. Athlone Press of the University of London, London, 304 p.Google Scholar
Siverson, M. 1995. Revision of the Danian cow sharks, sand tiger sharks, and goblin sharks (Hexanchidae, Odontaspididae, and Mitsukurinidae) from southern Sweden. Journal of Vertebrate Paleontology, 15:1–12.CrossRefGoogle Scholar
Sweet, W. C. (ed.). 1982. Pander Society Newsletter 14, 40 p. The Department of Geology & Mineralogy, The Ohio State University. Columbus, Ohio.Google Scholar
von Bitter, P. H., and Millar-Campbell, C. 1984. The use of “spikes” in monitoring the effectiveness of phosphatic microfossil recovery. Journal of Paleontology, 58:1193–1195.Google Scholar
Waller, R. R., Stairs, R. A., and Miller, T. 1992. Improving the selectivity of a selective dissolution process: a solution for removing calcite from fluorapatite. Collection Forum, 8(1):22–34.Google Scholar
Wiman, C. 1895. Über die Graptoliten. Bulletin of the Geological Institution of Upsala, 2:239–316.Google Scholar
Wiman, C. 1896. The structure of the Graptolites. Natural Science, 9:186–249.Google Scholar