Download or read book Upper Paleozoic Stratigraphic History and Provenance of the Farewell Terrane SW Alaska written by Matthew A. Malkowski and published by . This book was released on 2010 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Farewell terrane, in southwest Alaska, is predominantly located in the western Alaska Range, but crops out as far north as the Kuskokwim Mountains and represents one of the largest exotic terranes in the North American Cordillera. Exposed both north and south of the Denali fault, the Farewell terrane contains three somewhat distinct stratigraphic successions: 1) Neoproterozoic-Devonian carbonate rocks of the Nixon Fork subterrane, 2) Cambrian-Devonian carbonate and siliciclastic strata of the Dillinger subterrane, and 3) Devonian-Jurassic siliciclastic strata of the Mystic subterrane. This investigation aims to constrain the upper Paleozoic tectonic evolution of the Farewell terrane through sedimentologic interpretations and measured stratigraphy as well as by utilizing combined provenance techniques of sandstone modal compositions and U-Pb detrital zircon geochronology. Measured stratigraphy and sedimentologic analyses of upper Paleozoic (Mississippian--Permian) siliciclastic strata from the Mystic subterrane suggest a submarine basin-floor turbidite fan depositional environment. Modal composition trends reveal pervasive occurrences of lithic volcanic and sedimentary grains reflecting contributions from a magmatic arc to a recycled orogen source. U-Pb detrital zircon age peaks from the newly defined Mystic Pass formation reveals four trends in age spectra: 2000-1800 Ma, 465-405 Ma, 365-315 Ma, and 305-290 Ma. These trends correlate with both Siberian and North American magmatic source areas.
Download or read book Paleozoic Stratigraphy in the Northwest Coastal Area of Prince of Wales Island Southeastern Alaska written by G. Donald Eberlein and published by . This book was released on 1970 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleozoic rocks are divided into 10 newly named formations and are briefly described.
Download or read book Geologic Studies in Alaska by the U S Geological Survey 1994 written by and published by . This book was released on 1996 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annotated Bibliography of Alaska Paleozoic Paleontology written by J. Thomas Dutro and published by . This book was released on 1956 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geologic Studies in Alaska by the U S Geological Survey 1997 written by Karen D. Kelley and published by . This book was released on 1999 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mesozoic Stratigraphy of Alaska written by George Curtis Martin and published by . This book was released on 1926 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleozoic to Neogene Stratigraphic and Structural History of the Alaska Range Suture Zone North of the Denali Fault East Central Alaska Range written by Casey Jean Huff and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cretaceous to Neogene significance and evolution of the ~2000 km long Denali fault, which extends from southern Alaska into the Yukon Territory, including its role in the development of the Alaska Range suture zone, is poorly understood. The Denali fault within the Alaska Range suture zone is addressed on two different timescales in this study. First, this study presents stratigraphic evidence for the evolution of the collision of the allocthonous Wrangellia composite terrane (WCT) into the margin of Mesozoic North America. The collision resulted in the formation Alaska Range suture zone in south-central Alaska. This study focused on the northern edge of the suture zone within the east central Alaska Range just north of the Denali fault. The stratigraphy of Devonian to Upper Cretaceous sedimentary strata are examined using U-Pb ages and Hf isotopic compositions on detrital zircons along with point counts on sandstones. The data show that a pre-collisional sandstone of the Devonian Yanert Fork assemblage has a maximum depositional age (MDA) of ~384 Ma and a strong affinity for the continental margin of North America. The Upper Jurassic-Lower Cretaceous east central Alaska Range Kahiltna assemblage (MDA ~145 Ma) is in a faulted, unconformable contact with the Devonian Yanert Fork formation. Hf isotopic data from this unit indicates sediment was sourced from both the WCT and Mesozoic North America. These data suggest that deposition from North America into the Kahiltna basin occurred 20 m.y. earlier than previous studies have suggested. The deposition of the transitional marine to non-marine Upper Cretaceous Panorama Peak unit (MDA ~84 Ma) indicates collision ended by the late Cretaceous. Second, this study examines the brittle structures accommodating the ~22 Ma to recent exhumation of the east central Alaska Range immediately north of the active, dextral-slip Denali fault. Using the graphical kinematic method on slickenlines in brittle fault zones from the region of youngest (~1 Ma apatite fission track age) exhumation and comparing it to the region of minor Neogene exhumation (~15 Ma apatite fission track age), this study shows that most faults in the region are NW-SE striking, moderately-to-steeply dipping normal faults and E-W striking dextral strike-slip faults. The fault plane solutions are compatible with right-lateral simple shear along the E-W striking right-lateral strike-slip Denali fault. The prevalence of these normal faults suggests that the youngest exhumation within the east central Alaska Range is accommodated at the surface by normal faults.
Download or read book Late Proterozoic to Devonian Continental Sequence Alaska written by Julie A. Dumoulin and published by Geological Society of America. This book was released on 2014 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nothing provided
Download or read book Stratigraphy Metamorphic Geology and Structural Geology of the Central Alaska Range Alaska written by Kirk W. Sherwood and published by . This book was released on 1979 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geologic Studies in Alaska by the U S Geological Survey During written by and published by . This book was released on with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphic Framework of the Alaska Peninsula written by Robert L. Detterman and published by . This book was released on 1996 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FOSSIL RECORD 7 written by Spencer G. Lucas and published by New Mexico Museum of Natural History and Science. This book was released on 2021-04-01 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Terrane Puzzle written by Robert B. Blodgett and published by Geological Society of America. This book was released on 2008 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Displaced or tectonostratigraphic terranes comprise a huge portion of real estate in the North American Cordillera. Terranes are discrete, fault-bound blocks of regional extent, with rocks and fossils that differ to a great extent from those of adjacent blocks. The allochthonous nature of most terranes, relative to adjacent craton, is well established. When mapped, they resemble a collage of mixed rock types, tectonic styles, metamorphism, and volcanic origins--each part resembling the pieces of a puzzle. Terrane studies remain integral to understanding the geological evolution of western North America. Since the initiation of the concept summarized in 1979 by the late David L. Jones, the significance of fossils and stratigraphy has been key to solving the puzzle. Chapters of this book written by experts in their field, provide a sense of the diversity of approaches in paleontology and stratigraphy. Contributions span geologic time from the Precambrian (Vendian) to Cretaceous and address over 20 Cordilleran terranes."--Publisher's website.
Download or read book Stratigraphy and Paleontology of the Revised Type Section for the Tahkandit Limestone Permian in East central Alaska written by Earl E. Brabb and published by . This book was released on 1971 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Additional title page description: Revisions in the definition, description, and paleontology of an Arctic Permian formation.
Download or read book Stratigraphy and Sedimentation of Upper Paleozoic Volcanics Volcaniclastics and Limestones in the Eastern Alaska Range Alaska written by Wendell A. Bond and published by . This book was released on 1973 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Upper Paleozoic Stratigraphy and Corals from the East central Alaska Range Alaska written by Charles L. Rowett and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
