The deposits of the 2011 eruption consists of six alter-nating pumice lapilli and ash-grade units that raise questions about the potential role of magma outgassing in driving fragmentation and about the explosive nature of the 2011 eruption.
Þessar einingar, sér í lagi vikurlögin, vekja spurningar um framlag kvikugasa og afgösunar til sun-drunar á kvikunni og aflsins sem keyrði gosið áfram.