Detrital zircon double-dating of forearc basin strata reveals magmatic, exhumational, and thermal history of sediment source areas.

Mitte des 20. The Chugach terrane in the transect area consists of three successively accreted units: (1) minor greenschist and intercalated blueschist, the schist of Liberty Creek, of unknown protolith age that was metamorphosed and probably accreted during the Early Jurassic, (2) the McHugh Complex (Late Triassic to mid‐Cretaceous protolith age), a melange of mixed oceanic, volcaniclastic, and olistostromal rocks that is metamorphosed to prehnite‐pumpellyite and lower greenschist facies that was accreted by middle Cretaceous time, and (3) the Upper Cretaceous Valdez Group, mainly magmatic arc‐derived flysch and lesser oceanic volcanic rocks of greenschist facies that was accreted by early Paleocene time. Use the link below to share a full-text version of this article with your friends and colleagues.
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Chugach Mountains a range near Anchorage Alaska. Recognition of ocean plate stratigraphy in accretionary orogens through Earth history: A record of 3.8billion years of sea floor spreading, subduction, and accretion. Pacific moisture from the Gulf of Alaska meets Arctic cold right on our doorstep, dropping flakes that are not only frequent but stable, allowing you to take on some of the steepest terrain in the world with confidence. Long‐term fore‐arc basin evolution in response to changing subduction styles in southern Alaska. Continental Lithosphere: Deep Seismic Reflections. Details. Secure .gov websites use HTTPS Crustal structure of the active margin, south central Alaska: An interpretation of seismic refraction data from the Trans‐Alaska crustal transect. Rhyolitic calderas of the Yukon‐Tanana Terrane, east central Alaska: Volcanic remnants of a Mid‐Cretaceous magmatic arc.


Geology of the Chugach Mountains and Southern Copper River Basin, Southern Alaska. LockA locked padlock Chugach Mountains, Alaska' Deformation and Uplift in a Forearc Setting TIMOTHY A. Our terrain is legendary, but not just for those mega-extreme descents you see in ski films — any skier who is confident in-bounds at a ski resort can have a world of fun at VHSG. Oxygen fugacity at the base of the Talkeetna arc, Alaska. Protected PDF Document – A Protected Document provides both the reader and the publisher with maximum security and helps guard against unauthorized users. Diese Seite wurde zuletzt am 20. Explore recent publications by USGS authors, Browse all of Pubs Warehouse by publication type and year, Descriptions of US Geological Survey Report Series, Guide to the Bedrock Geology of a traverse of the Chugach Mountains from Anchorage to Cape Resurrection, Alaska Science Center, Alaska Science Center Geology Minerals, Prepared for a field trip in conjunction wit h the 80th annual meeting of the Cordilleran Section of the Geological Society of America, May 30 and 31, and June 1, 1984, in Anchorage , Alaska. Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username, By continuing to browse this site, you agree to its use of cookies as described in our, Journal of Advances Seismic velocity structure and anisotropy of the Alaska subduction zone based on surface wave tomography. Viewing: 1-24 of 42. A Protected Document is delivered as a PDF file “wrapped” in a registration file (DRM – Digital Rights Management file) that only allows the user to review and print the PDF from the machine to which it was originally downloaded.

Open Document – An Open Document is a fully functional PDF that can be circulated (a digital copy or hard-copy printed documents) outside the purchasing organization. Share sensitive information only on official, secure websites. Crustal structure of the Chugach Mountains, southern Alaska: A study of peg‐leg multiples from a low‐velocity zone, Journal of Geophysical Research: Solid Earth, Northern Chugach Mountains-Southern Copper River Basin Segment of the Alaskan Transect. Provenance signature of changing plate boundary conditions along a convergent margin: Detrital record of spreading-ridge and flat-slab subduction processes, Cenozoic forearc basins, Alaska. The Trans‐Alaskan Crustal Transect in the southern Copper River Basin and Chugach Mountains traverses the margins of the Peninsular and Wrangellia terranes, and the adjacent accretionary oceanic units of the Chugach terrane to the south. Login as a different user Response of a Rheologically Stratified Lithosphere to Subduction of an Indenter‐Shaped Plate: Insights Into Localized Exhumation at Orogen Syntaxes. [2] Der Name bezieht sich auf die schmale und steile Gletscherzunge des Cascade-Gletschers, die an einen stufenartigen Wasserfall erinnert. Upper-crustal cooling of the Wrangellia composite terrane in the northern St. Elias Mountains, western Canada. Small Bodies, Solar Systems

Der Gletscher bedeckt eine Fläche von etwa 9,5 km² und besitzt eine mittlere Breite von 1,5 km. A. Dumoulin Guide to the Bedrock geology of a Traverse of the Chugach Mountains from Anchorage to Cape Resurrection, 1984 Pages 4-14, 35-40.

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