Articles | Volume 20, issue 2
J. Micropalaeontol., 20, 123–125, 2001
https://doi.org/10.1144/jm.20.2.123
J. Micropalaeontol., 20, 123–125, 2001
https://doi.org/10.1144/jm.20.2.123

  01 Dec 2001

01 Dec 2001

An oxidation and stable mounting technique for geothermally altered Upper Devonian palynomorphs from western Venezuela

Craig Harvey Craig Harvey
  • Centre for Palynology, University of Sheffield, Dainton Building, Brook Hill, Sheffield S3 7HF, UK

Abstract. Upper Devonian sediments from western Venezuela have yielded palynomorphs that exhibit the palynomorph re-darkening and cracking phenomenon during post-oxidation mounting. A preparation technique has been developed, utilizing a diluted Schultze solution for prolonged periods, that appears not to affect substantially the structure of the palynomorphs, and thus prevents re-darkening. The use of PVA and Petropoxy 154 for mounting ensured the post-oxidative stability of the palynomorphs at room temperature. Conversely, the use of Elvacite 2044 as a mounting medium may cause cracking of the palynomorphs, related to shrinkage during solvent evaporation.

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