Beasley, Charlotte; Parvaz, Daniel B; Cotton, Laura; Littler, Kate (2021): Disaggregated indurated carbonate samples using Calgon, acetic acid and electric pulse fragmentation [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.927054
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Abstract:
Three disaggregation methods, i.e. Calgon, acetic acid and electric pulse fragmentation (EPF), have been applied to a range of heavily lithified, carbonate-rich sedimentary rock samples of Paleogene age. Samples are predominantly from the carbonate-rich, shallow water domain (< 250m palaeo-water depth) of Tanzania, Malta and the United Arab Emirates (Paleogene Tethys Ocean). The effectiveness and efficiency of each method has been compared, in addition to the preservation of the resultant liberated microfossil material (primarily larger foraminifera; LF). Of the three methods, the most efficient and effective was EPF, which liberated the largest number of LF in a very short processing time and resulted in the best preservation. Samples with calcitic, silicic, and clay matrices and cements were successfully disaggregated using EPF. In this study, recovered microfossils were largely > 500 μm, suggesting this technique may be more appropriate for liberating larger microfossils (e.g. LFs); however, we discuss nuances to the method that would allow for more effective recovery of smaller microfossil specimens. The more traditional acetic acid method was also able to disaggregate a number of the samples; however, preservation of the LF was compromised. We suggest a best-practice methodology for implementing EPF in micropalaeontological studies.
Supplement to:
Beasley, Charlotte; Parvaz, Daniel B; Cotton, Laura; Littler, Kate (2020): Liberating microfossils from indurated carbonates: comparison of three disaggregation methods. Journal of Micropalaeontology, 39(2), 169-181, https://doi.org/10.5194/jm-39-169-2020
Coverage:
Median Latitude: 16.351148 * Median Longitude: 31.513426 * South-bound Latitude: -9.866667 * West-bound Longitude: 14.516667 * North-bound Latitude: 35.800000 * East-bound Longitude: 55.816667
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
3 datasets
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Datasets listed in this bundled publication
- Beasley, C; Parvaz, DB; Cotton, L et al. (2021): Percentage difference from number of larger formaminifera, electric pulse fragmentation (EPF) compared to acetic acid. https://doi.org/10.1594/PANGAEA.927039
- Beasley, C; Parvaz, DB; Cotton, L et al. (2021): Percentage difference from number of larger formaminifera, electric pulse fragmentation (EPF) compared to Calgon. https://doi.org/10.1594/PANGAEA.927038
- Beasley, C; Parvaz, DB; Cotton, L et al. (2021): Comparison of disaggregation techniques for indurated carbonates. https://doi.org/10.1594/PANGAEA.927037