11. Most of the subaerial part of the system is covered by Holocene-age lava fields. 12. Subaerial stems are the stems that do not rise up but grow just above the ground.13. During the 13th century, subaerial eruptions occurred on the fissure system along the Reykjanes fissure system. 14. It is uncertain whether the site of present-day Kilnwick would have been subaerial or submarine. 15. It is a northeast-trending complex of subaerial volcanic and volcaniclastic rocks covering 140 km 2. 16. However, this phenomenon is usually seen as subaerial ignimbrite ( pumice rich pyroclastic flows ) deposits. 17. Ice-marginal volcanism takes place when material from a subaerial eruption makes lateral contact with ice. 18. While they occupy many habitats, in North America all are found solely in freshwater or subaerial habitats. 19. The Canadian portion of the field is dominated by scattered remnants of upper Cenozoic subaerial lavas and pyroclastic rocks. 20. It consists of subaerial tephra and thin lava flow deposits that are surrounded by thick ice-ponded lava flows.