The Ketilidian orogeny was a late

Paleoproterozoic The Paleoproterozoic Era (;, also spelled Palaeoproterozoic), spanning the time period from (2.5–1.6 Ga), is the first of the three sub-divisions (eras) of the Proterozoic Eon. The Paleoproterozoic is also the longest era of the Earth's ...

mountain-building event that affected southern

Greenland Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is t ...

during the period 1.85 to 1.72 Ga. The orogenic belt formed during this event, sometimes known as the Ketilidian mobile belt, forms the southern boundary to the mainly Archaean

North Atlantic Craton The North Atlantic Craton (NAC) is an Archaean craton exposed in southern West Greenland, the Nain Province in Labrador, and the Lewisian complex in northwestern Scotland. The NAC is bounded by the Nagssugtoqidian orogen to the north and the 1.8 ...

. The belt is 250–350 km wide, much of it covered by ice. It is correlated with the Makkovik Province in

Labrador , nickname = "The Big Land" , etymology = , subdivision_type = Country , subdivision_name = Canada , subdivision_type1 = Province , subdivision_name1 ...

, Canada, which has a similar history.

References

{{Reflist Orogenies of North America Proterozoic North America Geology of Greenland Paleoproterozoic orogenies