Skaergaard intrusion

[1] The Skaergaard intrusion was formed 56 million years ago during the opening of the North Atlantic Ocean.

[1] Specifically, the lower parts of the intrusion are exposed to the north while sections of the roof are conserved to the south.

[1] This expedition was led by Wager accompanied by a small team, including geologist William Alexander Deer.

[1] The zone categorization is based on the occurrence of specific minerals such as augite, Fe-Ti oxides, rounded grains of olivine, apatite, and ferrobustamite.

[1] The intrusion formed from the crystallization of a convecting body of magma which resulted in the lineation, layering, cross bedding, and channel structures within the rocks.