... megathrust in the west, the Chugach–Saint Elias thrust fault in the north, and the Fairweather transform fault in the east ( Figs. 1 and 2 ). In contrast to the Seward-Malaspina system, the basal topography of the Bering Glacier is well defined, although is lacking for beneath most of the Bagley Ice...

...). Numbers indicate locations of 1—eastern Alaska Range; 2—central Alaska Range; 3—Talkeetna Mountains; 4—Matanuska Basin; 5—western Alaska Range; 6—eastern and western Chugach Mountains; 7—Wrangell Mountains; 8—St. Elias Mountains; 9—St. Elias syntaxis; 10—Mackenzie Mountains. Figure 2...

... Information Center (AEIC; http://www.aeic.alaska.edu/ ). The STEEP network includes 22 broadband seismometers in the Chugach–Saint Elias region of south-central Alaska. An additional 11 AEIC broadband stations were included in the P-wave data as well as 33 AEIC stations in the regional S-wave data...

... American plate (Elliott et al. 2010 ; Gulick et al. 2015 ). Flat-slab subduction of the Yakutat terrane since the Oligocene and collision with the North American plate along the Chugach–Saint Elias fault system since the Miocene resulted in the formation of the St. Elias Mountains (Plafker et al...

..., 1987 ). The suture, referred to as the Chugach–St. Elias fault, follows an irregular trace from a position offshore in the Copper River delta to the core of the orogen ( Pavlis et al., 2004 ; Chapman et al., 2012 ). To the east of the Malaspina Glacier, however, the suture merges with the active...

... in contouring (Appendix DR1). Asterisks denote ages by both Spotila et al. (2004) and Berger et al. (2008) . CSEF—Chugach St. Elias fault. * E-mail: [email protected] . 3 12 2007 20 2 2008 4 3 2008 © 2008 Geological Society of America 2008 St. Elias orogen glacial...

...-Sr isotope geochemical compositions, and geological field observations of late Paleozoic igneous rocks were used to identify the precise timing and significance of this tectonism in the Saint Elias Mountains region of southwestern Yukon and eastern Alaska. Middle to Late Pennsylvanian (301–307 Ma...

... by movement on the Queen Charlotte-Fairweather, Chugach-St. Elias, and Pamplona fault zones resulting in a major orogeny, crustal shortening, and uplift. How this convergence and resulting deformation affects onshore areas and major fault zones, such as the Denali system through the southwest Yukon...

... dotted lines outline area of Figs. 4A and 4B ). BBF—Bruin Bay fault; CMF—Castle Mountain fault; CSEF—Chugach-Saint Elias fault; Cret.—Cretaceous; Fm.—Formation. † [email protected] One of the key factors influencing plate interactions at convergent margins is the nature...

... of the St. Elias orogeny. The ∼14,000 images contained in 70 flight-line files had to be manually viewed to determine image quality, limiting the scope of this study. Most images were underexposed and illegible as raw files, and thus we were forced to make an automatic brightness and contrast adjustment...

... through it marking the interpreted basement position. Inversion of travel time data from the marine shots recorded by the onshore STEEP broadband stations shows that the depth of Yakutat Moho rapidly increases from ∼30 km offshore to 40–45 km beneath the Chugach–St. Elias Mountains ( Christeson et al...

... Ma is shown on the 6 Ma panel ( Engebretson, 1985 ). A–A′ represents the line of cross section shown in Figure 19 . Base map is modified from Waldien et al. (2018b) . Abbreviations: BRF—Border Range fault system, CF—Connector fault (inferred), CSEF—Chugach-St. Elias fault, DRF—Duke River fault...

... suite, there is compelling supporting evidence for a widespread Paleocene–Eocene slab-window–related thermal event across southern and interior Alaska; this event drove rapid rock cooling (e.g., Yukon-Tanana: Dusel-Bacon and Murphy, 2001 ; western Alaska Range: Benowitz et al., 2012a ; Saint Elias...

... Saint Elias (115B and C (E1/2)), SW Dezadeash (115A), NE Yakutat (114O), and Tatshenshini (114P) map areas, Yukon Territory and British Columbia : Geological Survey of Canada , Open Files 2188, no. 2191. Dusel-Bacon , C. , and Williams , I.S. , 2009 , Evidence for prolonged mid-Paleozoic...

... terrane in southeast Alaska ( Gehrels and Saleeby, 1987 ; Gehrels, 1990 ; Gehrels et al., 1996 ). Cambrian–Ordovician volcanic rocks also occur in the Donjek assemblage in the Saint Elias Mountains of SW Yukon ( Dodds and Campbell, 1988 ; Mihalynuk et al., 1993 ; Beranek et al., 2012 ). Ordovician...

... greater antiquity than the interglacial overprint. Cairnes (1917) , Bostock (1948) , and Tempelman-Kluit (1980) noted that the North American landmass north and east of the Saint Elias Mountains and west of the Continental Divide in southern Yukon is marked by a complex of incised plateaus, now...

... superterrane and similar Lower Paleozoic continental margin strata in the Saint Elias Mountains of Alaska. Chardon et al. (1999) suggested that sinistral shear zones in the midcoast region of British Columbia accommodated significant translations based on the separation of different-aged plutons and regional...

... , L.P. , Van Staal , C.R. , Gordee , S.M. , McClelland , W.C. , Israel , S. , and Mihalynuk , M. , 2012 , Tectonic significance of Upper Cambrian–Middle Ordovician mafic volcanic rocks on the Alexander terrane, Saint Elias Mountains, northwestern Canada : The Journal of Geology...

.... , Labay , K.A. , and Shew , N.B. 2006 . Geologic map of the Wrangell–Saint Elias Park and Preserve, Alaska. United States Geological Survey Scientific Investigations Map 2877, scale 1:350,000 . Ricketts , B.D. 2019 . Cordilleran sedimentary basins of western Canada record 180 million...

.... Schmoll H.R. , 2000 , A geologic guide to Wrangell-Saint Elias National Park and Preserve, Alaska : U.S. Geological Survey Professional Paper 1616 , 166 p. Zartman R.E. , 1984 , Lead, strontium, and neodymium isotopic characterization of mineral deposits relative to their geologic...