Hidden dangers? An investigation of volcanic and environmental impacts on human health and life in historical Iceland

• Main Author: Walser III, Joe
• Other Authors: Steinunn Kristjánsdóttir, Sagnfræði- og heimspekideild (HÍ), Faculty of History and Philosophy (UI), Hugvísindasvið (HÍ), School of Humanities (UI), Háskóli Íslands, University of Iceland
• Format: Doctoral or Postdoctoral Thesis
• Language: English
• Published: University of Iceland, School of Humanities, Faculty of History and Philosophy 2021
• Subjects: Osteology; Palaeopathology; Bioarchaeology; Archaeometry; Isotope; Trace element; Fluorosis; Syphilis; Medicine; Physical anthropology; Iceland; Volcano; Eruption; Poisoning; Provenance; Diet; Fornleifafræði; Eldgos; Heilsufar; Líkamsmannfræði; Doktorsritgerðir; Skriðuklaustur; Hekla
• Online Access: https://hdl.handle.net/20.500.11815/2516

Volcanic eruptions can cause significant human health and environmental threats both during and after their event due to the hazardous materials and gases that are actively or passively released into the surrounding environment. Historical records suggest that severe historic eruptions in Iceland caused mass mortality to livestock, famine, altered weather and led to the contamination of water and air, all of which significantly impacted the health and living condition of people in the past. The aim of the project was to investigate the effects of volcanic eruptions on human health across Icelandic history, as well as the impacts of the anthropogenic use of heavy metals (e.g., Hg, As, Pb) and climate change (e.g., cooling weather during the Little Ice Age). The study used a range of different methods but mainly analyses on human and animal bones and soil samples. Standard osteological analyses were conducted on skeletal individuals (n=186) from archaeological sites (n=7) across Iceland dated between the 10th and the 19th century. Samples were then collected for further analyses: human bone (n=36) and teeth samples (n=31), as well as animal bone samples (n=23) and soil samples (n=13), which were selected from the monastic-hospital site of Skriðuklaustur (AD 1493-1554). In addition to previously published comparative data, bone samples (n=14) and soil samples (n=9) were selected from a farm site, called Skeljastaðir, which was abandoned during the AD 1104 eruption of the nearby volcano Hekla. Standard osteological and palaeopathological methods were used for the skeletal analysis and anthropological descriptions. Microscopy, radiography, endoscopy, and other specialized techniques were used where necessary. Isotope (δ18O, 87Sr/86Sr, δ13C) and trace element (Hg, Pb, Cd, As, Zn, Sb, Ba, Sr) analysis of dental enamel was undertaken to investigate geographic provenance and possible exposure to toxic emissions during childhood. At the same time, isotope ratio mass spectometry of bone collagen samples (δ13C, δ15N, δ34S) ...