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Youngest Toba Tuff in the Son Valley, India: a weak and discontinuous stratigraphic marker
- Source :
- Quaternary Science Reviews, Quaternary Science Reviews, Elsevier, 2011, 30 (27-28), pp.3925-3934. ⟨10.1016/j.quascirev.2011.10.008⟩
- Publication Year :
- 2011
- Publisher :
- HAL CCSD, 2011.
-
Abstract
- International audience; Investigation of the climatic and environmental impacts of the Youngest Toba Tuff (YTT, ∼74 ka BP) eruption of Toba volcano, Sumatra, is crucial for understanding the consequences of the eruption for contemporaneous human populations. The Middle Son Valley, in India, was the first locality on the Indian subcontinent where the YTT was reported. The ash bed forms a discontinuous layer stretching for over 30 km along the river. Here we report on the stratigraphic contexts of YTT ash layers in alluvial deposits of the Middle Son Valley, in order to reconstruct the taphonomy of the ash deposits and the dynamic of their deposition. Although the distal ash has been studied since the 1980s, its stratigraphic integrity and the mechanisms and pathways involved in its transport and deposition have bit previously been assessed. We find that the YTT occurrences in the Middle Son Valley may not be reliable chronostratigraphical markers for millennial scale palaeoenvironmental reconstruction.
- Subjects :
- 010506 paleontology
Archeology
Taphonomy
[SDE.MCG]Environmental Sciences/Global Changes
Fluvial
010502 geochemistry & geophysics
01 natural sciences
Deposition (geology)
Paleontology
Fluvial geomorphology
[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology
Toba
Tephra
Ecology, Evolution, Behavior and Systematics
0105 earth and related environmental sciences
Global and Planetary Change
geography
geography.geographical_feature_category
Geology
Archaeology
Indian subcontinent
Volcano
13. Climate action
Alluvium
Son Valley
Subjects
Details
- Language :
- English
- ISSN :
- 02773791
- Database :
- OpenAIRE
- Journal :
- Quaternary Science Reviews, Quaternary Science Reviews, Elsevier, 2011, 30 (27-28), pp.3925-3934. ⟨10.1016/j.quascirev.2011.10.008⟩
- Accession number :
- edsair.doi.dedup.....142d2b11b13ef5f901d5faf6a793a7ee