The Iowa Geoscience Education Information Network

Explore Iowa Geology

Iceland: The Land of Fire and Ice

iceland Gollfoss from Explore Iowa's Geology (IGEIN) on Vimeo.


Gullfoss, a massive waterfall along the Hvita River in southern Iceland. The water flows through a canyon that Geologists believe was created by a jokulhlaup. A jokulhlaup is an icelandic term for when a volcanic erruption occurs underneath an active glaicer, creating a massive flood. During a jokulhlaup the amount of water flowing towards the sea during a single 24 hour period can equal a normal flow of up to five years!









Iceland waterfall from Explore Iowa's Geology (IGEIN) on Vimeo.


Skogafoss is 25m across and drops approximately 60m. The Skógafoss waterfall is situated in the south of Iceland at the cliffs of the former coastline. After the coastline had receded into the sea (it is now at a distance of about 5 km from Skógar), the cliffs stayed behind parallel to the coast over hundreds of kilometers, creating together with some mountains a clear border between the Lowlands and the Highlands of Iceland.









iceland5 153 from Explore Iowa's Geology (IGEIN) on Vimeo.


Eldgja (Eruption fissure and lava flow), This fissure is approximatley 75km from end to end, this video show the midsection of the overall fissure and is 600 m across and 150 m deep. Lava from this volcanic feature covered an area of 800 km2 and is up to 14 km3 in volume. The Eldgja eruption is thought to have occured from 934 to 940 AD.

 



Untitled from Explore Iowa's Geology (IGEIN) on Vimeo.


Krysuvik (High temperature geothermal area This is a close up video of an Icelandic Solfataras. These high temperature areas occur over near surface magma chambers or intrustions and represent the release of the Earth's internal energy. They often contain blue-grey boiling clay due to sulphur and iron compounds in the environment.








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