A little goes a long way: discovery of a new mid‐Holocene tephra in Sweden

• Published in: Boreas
• Main Author: BOYGLE, JANE
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1998
• Subjects: Hekla
• Online Access: http://dx.doi.org/10.1111/j.1502-3885.1998.tb00878.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1998.tb00878.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1998.tb00878.x

This pilper reports the presence of a volcanic ash layer in western Sweden which is geochemically identiticd as the Kebister tephra. This tephrdpresenceof (dated c . 3600 14 C BP) was discovered at Kebister, Shetland and thc rcsults presented here indicate that the deposit may have a greater geographical distribution than previously thought. The geochemistry of the volcanic glass was analysed by using discrete grain electron probe microanalysis (EPMA). Thc SiO 2 content of the glass ranges from 66.19 to 71.96%, FeO content 2.73 to 6.07% and MgO content 0.15 to 0.57% ˜ The tephra can he distinguished from the more widespread Hekla 4 tephra ( c . 3800 14 C BP) on the basis of calcium and magnesium contents.