Eurekan orogeny
The Eurekan orogeny was a Phanerozoic mountain building event that affected the eastern portion of the Arctic Archipelago and, to a lesser extent, northern Greenland. Deformation initiated in the Late Cretaceous, during that time the Sverdrup Basin began to fragment and fold in response to the counterclockwise rotation of Greenland, caused by seafloor spreading in the Canadian Arctic Rift System. Isostatic uplift was most pronounced in the Grantland Mountains and Victoria and Albert Mountains on Ellesmere Island and in the Princess Margaret Range on Axel Heiberg Island, as evidenced by the current physiography. Compression in a broad zone on Ellesmere Island resulted in the formation of the Eurekan Fold Belt. 

The Eurekan orogeny terminated when seafloor spreading in the Labrador Sea ceased about 33 million years ago during the Oligocene epoch. Erosion of the orogenic mountains followed, resulting in the deposition of undeformed sediment above the eroded remnants of deformed rock. At least some of the coarse clastic sediments in the Beaufort Formation were derived from the Grantland Mountains and Princess Margaret Range, suggesting that these ranges had higher elevations during the Late Miocene or Early Pliocene times.
Q101313
Phanerozoic
TIME
Q6925465
mountain building
UNK
Q85377
Arctic Archipelago
LOC
Q223
Greenland
LOC
Q2672013
Deformation
Concept
Q338199
Late Cretaceous
TIME
Q81659
fold
Concept
Q215920
seafloor spreading
UNK
Q65043840
Canadian Arctic Rift System
UNK
Q7927157
Victoria and Albert Mountains
LOC
Q146841
Ellesmere Island
LOC
Q7244701
Princess Margaret Range
LOC
Q207666
Axel Heiberg Island
LOC
Q52107
physiography
Concept
Q184189
Labrador Sea
LOC
Q101873
Oligocene
LOC
Q754897
epoch
Concept
Q184554
orogenic
Concept
Q6495247
Late Miocene
UNK
Q146094
Early Pliocene
TIME
Q85759803
Eurekan orogeny
Concept
Q85759803
Eurekan orogeny
Concept
+33^^http://www.w3.org/2001/XMLSchema#decimal
33
NUMBER
instance of