Download or read book Tectonic and Structural Evolution of the Ghost Rocks Formation Kodiak Island Alaska written by Timothy Briggs Byrne and published by . This book was released on 1981 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sedimentology Structural Geology and Paleomagnetism of the Ghost Rocks Formation Kodiak Islands Alaska written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty-two hundred kilometers of Alaskan coastline, from Sanak to Baranof Islands, contains evidence of a Cretaceous to Eocene trench-ridge-trench (TRT) triple junction. Due to the long-term presence of inboard right-lateral strike-slip faults, the original location of the TRT triple junction with respect to North America is unknown. Previous paleomagnetic studies of the Ghost Rocks Formation of the Kodiak Islands, AK indicate a Latest Cretaceous to Early Paleocene TRT triple junction location of ~42 degrees north latitude (Plumley et al., 1983). However, this data set has proved controversial in the literature due to discordant site mean directions between the two major bays studied (Alitak and Kiliuda) as well as a 2-stage structural correction in Alitak Bay and possible remagnitization (e.g. Haeussler et al., (2003a). This study presents new sedimentologic, structural geologic, and preliminary paleomagnetic data in an attempt to resolve the location of TRT the triple junction. The Ghost Rocks Formation is part of an accretionary complex which contains turbidites interlayered with pillow lavas and intruded by gabbro and mafic sills. New structural geologic mapping of the Ghost Rocks Formation shows a mean bedding strike of ~250 degrees, and small-scale block rotations in Alitak Bay. Oriented samples across the formation were taken to include a baked contact test, conglomerate test, and fold test to ensure reliable data. 14 sites from Alitak Bay have been fully analyzed, and 12 sites have been partially analyzed. Second-removed magnetic components represent primary magnetization, and 13 sites showed reliable demagnetization behavior and bedding measurements. In-situ site mean direction for these 13 sites (D=349, I=-45, n=13, k=4.3, [alpha]95=22.8) is improved when corrected for local stratigraphy and structural block rotations (D=178, I=-63, n=13, k=29.2, [alpha]95=7.8). These results are in partial agreement with the original data, and show an improved agreement between the original Kiliuda Bay and the new Alitak Bay declination directions. Continued study of remaining sites will further constrain the data.
Download or read book Structure Tectonics and Sedimentology of the Kodiak Formation Kodiak and Adjacent Islands Alaska written by James Clifford Sample and published by . This book was released on 1986 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tectonics written by Eldridge M. Moores and published by Waveland Press. This book was released on 2014-07-23 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deformation of the Earth’s crust happens at a multitude of scales, ranging from submicroscopic to planetary. Tectonics explores structures and processes from regional to global, differentiating itself from the material covered in most structural geology textbooks. Moores and Twiss emphasize basic principles and methodologies of tectonics, embracing the time-honored perspective of using present processes to understand the past. Comprehensive in scope and detail, coverage includes the effects of plate motions and reconstructions and the resultant structures associated with active rift, transform, and subduction boundaries as well as triple junctions and collision zones; deformations of both the ocean basins and the continents; and orogenic belts. Moores and Twiss present tectonics as an open-ended field of study in which assumptions can be challenged and interpretations changed. The authors emphasize the use of models as a means of understanding observations and putting them in context to maintain a distinction between what we know from observing the Earth and what we infer from interpretation.
Download or read book Current Topics in Structural Geology written by P. L. Hancock and published by Elsevier. This book was released on 2013-08-29 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Topics in Structural Geology is a collection of invited papers on particular topics of interest in structural geology, from field-based problems on the scale of terranes to microstructures in nature and experiment. Contributors also explore earthquake faulting; S-C mylonites; tectonics and hydrogeology of accretionary prisms; deformation mechanisms; transparent polycrystals; shape and lattice preferred orientations; and mushroom-shaped diapirs. This text is comprised of 13 chapters; the first of which introduces the reader to shallow crustal earthquakes and the structural geology of fault zones. The first chapter also emphasizes the seismogenic regime, strike-slip earthquake rupture processes, structural questions posed by seismology, and mesothermal gold-quartz lodes hosted in steeply inclined shear zones of mixed 'brittle-ductile' character. Discussion then turns to normal faulting in the upper continental crust, along with the application of a method based primarily on fault slip data analysis to determine paleostress in terms of orientation and magnitude. The mechanical behavior and deformation textures of simulated halite shear zones are considered, with special regard to the internal structures of S-C mylonites and their mechanical implications. The remaining chapters examine the role of decollement zone in the tectonics and hydrogeology of accretionary prisms; synkinematic microscopy of transparent polycrystals; and the origin of metamorphic core complexes and detachment faults formed during Tertiary continental extension in the northern Colorado River region. This book is intended primarily for students and practitioners of structural geology.
Download or read book Melanges written by Loren A. Raymond and published by Geological Society of America. This book was released on 1984 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Initial Reports of the Deep Sea Drilling Project written by and published by . This book was released on 1986-05 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution Facies Ages and Proposed Tectonic Associations of Regionally Metamorphosed Rocks in East and South central Alaska written by and published by . This book was released on 1993 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tectonic Evolution of the Shoo Fly Formation and the Calaveras Complex Central Sierra Nevada California written by Tapas Bhattacharyya and published by . This book was released on 1986 with total page 712 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 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural evolution of underthrusted sediments Kodiak Islands Alaska written by D. FISHER and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1982 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book MMS written by and published by . This book was released on 1989 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mesozoic Geology of the Kodiak Islands and Its Bearing on the Tectonics of Southern Alaska written by William Connelly and published by . This book was released on 1976 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geology of the Alaska Peninsula Island Arc and Continental Margin Part 1 written by C.A. Burk and published by Geological Society of America. This book was released on 1965 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Petroleum Abstracts written by and published by . This book was released on 1983-04 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trench forearc Geology written by Jeremy K. Leggett and published by Wiley-Blackwell. This book was released on 1982 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
