Abstract
SINCE its introduction by Beckmann1 in 1952, the monochloracetic acid method of processing limestones for conodont investigations has been the most widely used procedure in Germany and many other countries for the recovery of conodonts. Criticizing this method, Fahlbusch2 stated that monochloracetic acid could etch or even completely destroy part of the conodont fauna, and implied that structural changes in conodonts might be caused by solution. Beckmann et al.3 were able to show by experiment and from experience that Fahlbusch's contentions, based on erroneous theory and analogy, were not valid for the Devonian conodont faunas then under discussion. New evidence from the processing of Swedish Ordovician faunas indicates, however, that monochloracetic acid can have a corrosive effect on some conodonts.
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References
Beckmann, H., Paläont. Z., 26, 138 (1952).
Fahlbusch, K., Palaeontographica, A, 123, 137 (1964).
Beckmann, H., Collinson, C., Helms, J., Huckriede, R., Klapper, G., Krebs, W., Lindström, M., Rhodes, F. H. T., Walliser, O. H., and Ziegler, W., N. Jb. Geol. Paläont. Mh., 7, 385 (1965).
Lindström, M., Geol. Fören. Stockholm Förh., 76, 517 (1955).
Lindström, M., Rep. Twenty-first Intern. Geol. Cong., Pt. 7, 88 (1960).
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ZIEGLER, W., LINDSTRÖM, M. & MCTAVISH, R. Monochloracetic Acids and Conodonts—a Warning. Nature 230, 584–585 (1971). https://doi.org/10.1038/230584a0
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DOI: https://doi.org/10.1038/230584a0
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