Articles | Volume 20, issue 2
https://doi.org/10.1144/jm.20.2.123
© Author(s) 2001. This work is distributed under the Creative Commons Attribution 4.0 License.
01 Dec 2001
| 01 Dec 2001
An oxidation and stable mounting technique for geothermally altered Upper Devonian palynomorphs from western Venezuela
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.
