Totschunda Fault
The Totschunda Fault is a major active dextral (right-lateral) continental strike-slip fault in southeastern Alaska. It forms a link between the Denali Fault to the northwest and the Fairweather Fault to the southeast. The northwestern end of the fault ruptured during the 2002 Denali earthquake.[1]
Based on radiometric dating of a dike that cuts fault rock associated with the Totschunda Fault to about 114 million years ago, the fault zone was initiated during the latter part of the Early Cretaceous, associated with the accretion of the Wrangellia Terrane.[2]
References
[edit]- ^ Eberhart-Phillips, Donna; Haeussler, Peter J.; Freymueller, Jeffrey T.; Frankel, Arthur D.; Rubin, Charles M.; Craw, Patricia; Ratchkovski, Natalia A.; Anderson, Greg; Carver, Gary A; et al. (May 2003). "The 2002 Denali Fault Earthquake, Alaska: A Large Magnitude, Slip-Partitioned Event". Science. 300 (5622, number 5622). Elsevier: 1113–1118. Bibcode:2003Sci...300.1113E. doi:10.1126/science.1082703. PMID 12750512.
- ^ Trop, J.M.; Benowitz, J.A.; Koepp, D.Q.; Sunderlin, D.; Brueseke, M.E.; Layer, P.W.; Fitzgerals, P.G. (2019). "Stitch in the ditch: Nutzotin Mountains (Alaska) fluvial strata and a dike record ca. 117–114 Ma accretion of Wrangellia with western North America and initiation of the Totschunda fault". Geosphere. 16. doi:10.1130/GES02127.1.
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