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Centennial to decadal vegetation community changes linked to orbital and solar forcing during the Dan-C2 hyperthermal event.
- Source :
-
Journal of the Geological Society . 2017, Vol. 174 Issue 6, p1019-1030. 12p. - Publication Year :
- 2017
-
Abstract
- Formed close to the K-Pg boundary, the Boltysh meteorite crater, Ukraine, preserves >400 m of lacustrine sedimentary rocks that include a record of the early Danian Dan-C2 hyperthermal event. Abundant pollen, spores and algae recovered from these sediments have yielded a cyclic record of plant ecology change paced by c. 21 kyr orbital precession cycles. New, higher resolution sampling across the inception of the Dan-C2 hyperthermal event has identified oscillations in vegetation community ecology at sub-orbital periods of c. 2 kyr, c. 200 years and c. 11 years. These are consistent with possible Hallstatt, DeVreis-Suess and Schwabe solar cycles, respectively. Rapid regime shift from savanna to a mesic forest ecosystem was paced by c. 21 kyr precession, with the shift probably occurring in <200 years. Prior to regime shift, c. 2 kyr (i.e. possible Hallstatt) oscillations between mesic- and winterwet-dominated plant communities increased in intensity, suggestive of ecological flickering. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POTASSIUM compounds
*METEORITE craters
*SEDIMENTARY rocks
*POLLEN
*SPORES
Subjects
Details
- Language :
- English
- ISSN :
- 00167649
- Volume :
- 174
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of the Geological Society
- Publication Type :
- Periodical
- Accession number :
- 126083081
- Full Text :
- https://doi.org/10.1144/jgs2017-022