The distribution of fossil pollen and charcoal in stalagmites

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ID: 288821
2024
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Abstract
Pollen preserved in caves provides a little-appreciated opportunity to study past vegetation and climate changes in regions where conventional wetland sediments are either unavailable, contain little organic matter, and/or are difficult to date accurately. Most palynology in caves has focused on clastic infill sediments, but pollen preserved in growing speleothems provides important new opportunities to develop vegetation and climatic records that can be dated accurately with radiometric methods. However, when pollen is present in speleothems, concentrations can vary by orders of magnitude, highlighting how little we know about the processes that transport pollen into caves and onto speleothem surfaces, and that determine the pollen's preservation probability. To explore these aspects of speleothem pollen taphonomy, we investigated the distribution of pollen and microscopic charcoal within several stalagmites from southwest Australia. We examined spatial patterns in pollen and charcoal preservation in order to distinguish whether observed gradients result from preservation or are products of systematic transport processes working along stalagmite surfaces. We find that pollen grains and charcoal fragments are located preferentially on the flanks of most stalagmites. This suggests that pollen grain and charcoal deposition on speleothems is influenced by transport and accumulation of detrital debris on growing surfaces. These insights will assist in future sampling campaigns focusing on speleothem pollen and charcoal contents.
Reference Key
persistent_1761421826_68fd2a027daf3 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Jon Woodhead
Journal ADVANCES IN ARCHAEOLOGICAL PRACTICE
Year 2024
DOI
10.1017/qua.2023.11
URL
https://www.cambridge.org/core/product/B121550DEF35C0307204479855E15502
Keywords Keywords not found

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