Читать книгу Biogeography in the Sub-Arctic - Группа авторов - Страница 27

The volcanic activity in Iceland over the past 16 Ma is a direct continuation of the magmatism that commenced at 56–55 Ma in East Greenland (Figure 13, see Plate section). The North Atlantic spreading axis can be observed in the Icelandic eastern neo‐volcanic zone at the present day where the plume axis is presently inferred to underlie the Vatnajökull ice‐cap (Wolfe et al. 1997). Rift volcanism re‐commenced in October 2014 in the Bárđarbunga volcanic system and is currently active as I write. Volcanic cycles in Iceland are connected to rift‐jumping, thought to occur in order to bring the spreading centre over the plume axis. These cycles have an approximate life‐span of 8–12 Ma (Brooks 2011 and references therein).