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rotation model to persist as the consensus ern Caledonian connection for the Alexander Faehnrich, K., McClelland, W.C., Colpron, M., Nutt,
model with little supporting structural evi- terrane: Lithosphere, v. 5, p. 163–168, https://doi C.L., Miller, R.S., Trembath, M., and Strauss, J.V.,
.org/10.1130/L255.1.
dence. For instance, no demonstrable increase Chian, D., Jackson, H.R., Hutchinson, D.R., Shimeld, 2021, Pre-Mississippian stratigraphic architecture
of the Porcupine Shear Zone, Yukon and Alaska,
in shortening along the length of the Brooks J.W., Oakey, G.N., Lebedeva-Ivanova, N., Li, Q., and significance in the evolution of northern Lau-
Range or obvious contraction south of the Saltus, R.W., and Mosher, D.C., 2016, Distribu- rentia: Lithosphere (in press).
rotation axis in the Mackenzie delta exists to tion of crustal types in Canada Basin, Arctic Gibson, T.M., Faehnrich, K., Busch, J.F., McClelland,
support rotation. The rotation model has in Ocean: Tectonophysics, v. 691, p. 8–30, https:// W.C., Schmitz, M.D., and Strauss, J.V., 2021, A
doi.org/10.1016/j.tecto.2016.01.038.
essence achieved the status of a Geomyth Colpron, M., and Nelson, J.L., 2009, A Palaeozoic detrital zircon test of large-scale terrane displace-
ment along the Arctic margin of North America:
(Dickinson, 2003) since it is commonly Northwest Passage: Incursion of Caledonian, Geology, v. 49, p. 545–550, https://doi.org/10.1130/
assumed and rarely tested. Future models for Baltican and Siberian terranes into eastern Pan- G48336.1.
Mesozoic opening of the Canada Basin will thalassa, and the early evolution of the North Gilotti, J.A., and McClelland, W.C., 2007, Charac-
need to merge existing stratigraphic and geo- American Cordillera, in Cawood, P.A., and teristics of and a tectonic model for ultrahigh-
physical observations with the substantial Kröner, A., eds., Earth Accretionary Systems in pressure metamorphism in the overriding plate of
the Caledonian orogen: International Geology
Space and Time: Geological Society of London
database that documents the Paleozoic evolu- Special Publication 318, p. 273–307, https://doi Review, v. 49, p. 777–797, https://doi.org/10.2747/
tion and Mesozoic–Cenozoic reactivation of .org/10.1144/SP318.10. 0020-6814.49.9.777.
the CATS in order to solve a tectonic problem Colpron, M., McClelland, W.C., and Strauss, J.V., Grantz, A., Hart, P.E., and Childers, V.A., 2011,
that has dogged the community for decades. 2019, Detrital zircon U-Pb geochronological and Geology and tectonic development of the Am-
Hf isotopic constraints on the geological evolu- erasia and Canada Basins, Arctic Ocean, in
tion of North Yukon, in Piepjohn, K., Strauss, Spencer, A.M., Embry, A.F., Gautier, D.L.,
ACKNOWLEDGMENTS J.V., Reinhardt, L., and McClelland, W.C., eds., Stoupakova, A.V., and Sørensen, K., eds., Arc-
This contribution is based on the results of stud- Circum-Arctic Structural Events: Tectonic Evo- tic Petroleum Geology: Geological Society of
ies funded by National Science Foundation EAR lution of the Arctic Margins and Trans-Arctic London Memoir 35, p. 771–799, https://doi .org/
grants awarded to McClelland (0948359, 1049368, Links with Adjacent Orogens: Geological Soci- 10.1144/M35.50.
162413, 1947071), Strauss (1624131, 1650152, ety of America Special Paper 541, p. 397–437, Harrison, J.C., and Brent, T.A., 2005, Basins and
1947074), Gilotti (1049433, 1432970, 1650022), https://doi.org/10.1130/2018.2541(19). fold belts of Prince Patrick Island and adjacent
Gehrels (0947904), Macdonald (1049463), and the Cox, G.M., Strauss, J.V., Halverson, G.P., Schmitz, areas, Canadian Arctic Islands: Geological Sur-
Arizona LaserChron Facility (1032156, 1338583, M., McClelland, W.C., Stevenson, R.S., and Mac- vey of Canada Bulletin 560, 197 p., https://doi
1649254). Additional support for fieldwork was donald, F.A., 2015, Kikiktak Volcanics of Arctic .org/10.4095/220345.
provided by the Yukon Geological Survey (YGS) Alaska—Melting of harzburgitic sub-continental Helwig, J., Kumar, N., Emmet, P., and Dinkelman,
and Bundesanstalt für Geowissenschaften und lithospheric mantle associated with the Franklin M.G., 2011, Regional seismic interpretation of
Rohstoffe (BGR). This is YGS contribution number Large Igneous Province: Lithosphere, v. 7, crustal framework, Canadian Arctic passive
051. Luke Beranek and Erik Lundin provided con- p. 275–295, https://doi.org/10.1130/L435.1. margin, Beaufort Sea, with comments on petro-
structive reviews that improved this contribution. Dickinson, W.R., 2003, The place and power of leum potential, in Spencer, A.M., Embry, A.F.,
myth in geoscience: An associate editor’s per- Gautier, D.L., Stoupakova, A.V., and Sørensen,
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