Very Long-Lived Mollusks Confirm 17th Century AD Tephra-Based Radiocarbon Reservoir Ages for North Icelandic Shelf Waters
Bibliographic Data
| ID | 9244668 |
|---|---|
| Authors | Alan D Wanamaker (0000-0002-6560-6420), Jan Heinemeier (0000-0003-3024-6709), James D Scourse, Christopher A Richardson, Paul G Butler, Jón Eiríksson (0000-0001-5598-2417), Karen Luise Knudsen (0000-0002-4006-3618) |
| Year | 2008 |
| Volume | 50 |
| Issue | 3 |
| Pages | 399-412 |
| Publication date | 2008-01-01 |
| 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/s0033822200053510 |
| OpenAlex | W2111782747 |
| Language | EN |
| Citations received | 12 |
| References cited | 48 |
Marine sediment records from the north Icelandic shelf, which rely on tephrochronological age models, reveal an average ΔR (regional deviation from the modeled global surface ocean reservoir age) of approximately 150 yr for the last millennium. These tephra-based age models have not hitherto been independently verified. Here, we provide data that corroborate ΔR values derived from these sediment archives. We sampled the youngest portion (ontogenetic age) of a bivalve shell, Arctica islandica (L.), for radiocarbon analysis, which was collected alive in 2006 from the north Icelandic shelf in ∼80 m water depth. Annual band counting from the sectioned shell revealed that this clam lived for more than 405 yr, making it the longest-lived mollusk and possibly the oldest non-colonial animal yet documented. The 14 C age derived from the umbo region of the shell is 951 ± 27 yr BR Assuming that the bivalve settled onto the seabed at AD 1600, the corresponding local value of ΔR is found to be 237 ± 35 yr by comparison of the 14 C age with the Marine04 calibration curve (Hughen et al. 2004) at this time. Furthermore, we cross-matched a 287-yr-old, dead-collected, A. islandica shell from AD 1601 to 1656 from the same site with the live-caught individual. 14 C analysis from the ventral margin of this shell revealed a ΔR of 186 ± 50 yr at AD 1650. These values compare favorably with each other and with the tephra-based ΔR values during this period, illustrating that 14 C from A. islandica can effectively record 14 C reservoir changes in the shelf seas
Icelandic · Radiocarbon dating · Sediment · Tephra · Volcano · Archaeology and ancient environmental studies · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Geology · Oceanography · Paleontology
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| Citations per year | 0.75 |
|---|---|
| Citation span | 2010 - 2023 (14) |
| Highly cited | No |