Investigating Subantarctic 14 C Ages of Different Peat Components
Site and Sample Selection for Developing Robust Age Models in Dynamic Landscapes
Bibliographic Data
| ID | 9244752 |
|---|---|
| Authors | Zoë Thomas (0000-0002-2323-4366), Chris Turney (0000-0001-6733-0993), Chris S M Turney, Angela Hogg (0000-0002-4001-9027), Andreá N Williams (0000-0003-4133-4229), Alan N Williams, Chris J Fogwill |
| Year | 2019 |
| Volume | 61 |
| Issue | 4 |
| Pages | 1009-1027 |
| Publication date | 2019-08-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/rdc.2019.54 |
| OpenAlex | W2949885956 |
| Language | EN |
| Citations received | 4 |
| References cited | 56 |
Precise radiocarbon ( 14 C) dating of sedimentary sequences is important for developing robust chronologies of environmental change, but sampling of suitable components can be challenging in highly dynamic landscapes. Here we investigate radiocarbon determinations of different peat size fractions from six peat sites, representing a range of geomorphological contexts on the South Atlantic subantarctic islands of the Falklands and South Georgia. To investigate the most suitable fraction for dating, 112 measurements were obtained from three components within selected horizons: a fine fraction 0.2 mm, and bulk material. We find site selection is critical, with locations surrounded by high-ground and/or relatively slowly accumulating sites more susceptible to the translocation of older carbon. Importantly, in locations with reduced potential for redeposition of material, our results show that there is no significant or systematic difference between ages derived from bulk material, fine or coarse (plant macrofossil) material, providing confidence in the resulting age model. Crucially, in areas comprising complex terrain with extreme relief, we recommend dating macrofossils or bulk carbon rather than a fine fraction, or employing comprehensive dating of multiple sedimentary fractions to determine the most reliable fraction(s) for developing a robust chronological framework
Archaeology · Geography · Holocene · Macrofossil · Mineralogy · Peat · Physical geography · Radiocarbon dating · Sedimentary rock · Chemistry · Coastal wetland ecosystem dynamics · Environmental Science · Geological formations and processes · Geology and Paleoclimatology Research · Geology · Paleontology
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| Unique citing works | 4 |
|---|---|
| Citations per year | 0,8 |
| Citation span | 2021 - 2022 (2) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 3 |