Download or read book The Last Stand of the Great American Carbonate Bank written by Sean Richard Cornell and published by . This book was released on 2008 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Upper Ordovician (450-460 Ma) Chazy, Black River and Trenton groups of eastern North America record the tectonic activation of a passive carbonate platform. Associated with tectonic collision and development of a peripheral-type foreland basin, the tectonic history is complicated by the occurrence of two basin-forming episodes. Although considered analogous by previous authors, a growing list of observations indicate that the stratigraphic record from both foreland basins and their coeval Great American Carbonate Bank (GACB) contain somewhat different, non-analogous, signatures. A number of key issues arise when comparing both tectonic episodes. These include: 1) non-analogous spatial-temporal scales whereby the northern (Vermontian) tectophase is much larger and of longer duration compared to the southern (Blountian) tectophase; 2) sedimentary provenance analyses show a more mafic contribution in the northern basin fill compared to that of the southern basin; 3) the position of K-bentonite swarms relative to basin filling phases is non-analogous; and 4) the location and timing of Ordovician volcanism/plutonism shows a pronounced change after the first tectophase. Thus, important research questions for this study include: A) How does the architecture of the foreland basin complex and adjacent GACB change spatially and temporally during each distinct tectophase?; B) Can provenance differences between tectophases be explained relative to tectonic events in the orogen?; C) What is the timing and significance of K-bentonite position and timing of plutonism/volcanism relative to foreland basin fill episodes?; 4) What inferences are gained from theoretical modeling of load geometries and foreland basin evolution when considered with empirical data from the Taconic Orogeny; and 5) Is a new model for the Taconic Orogeny needed to explain the growing list of incongruities? In order to investigate these questions, a refined, high-resolution, sequence stratigraphic framework has been constructed and utilized to re-calibrate Upper Ordovician strata during the last stand of the GACB. The refined framework was constructed using the occurrence of sequence boundaries, erosional surfaces, transgressive, highstand, and regressive systems tracts, hardgrounds and flooding surfaces, laterally extensive and unique lithofacies, highly repetitive sub-meter scale cyclic intervals, updated macrofaunal and microfaunal biostratigraphies, as well as known chemostratigraphic and event stratigraphic data (Nd, C, & Sr isotopic excursions, K-bentonite horizons, seismite horizons, etc.). Also defined for the first time are a number of time-restricted facies including widespread siliciclastic events, chert-rich intervals, and pronounced calcification events. As such, an improved temporal and spatial chronology of thirteen time-slices (~ 1 million year duration) has been produced for the Ashbyan, Mohawkian, to earliest Cincinnatian interval. This integrated stratigraphic model is used to link the sedimentary record of the foreland basin complex to climatic changes, sea-level oscillation, and specific tectonic events in the orogen. These data provide an understanding of the evolution of the foreland basin and its sub-components including the backbulge, forebulge, and foredeep basins. Moreover, coupled with newly calibrated strontium isotopic curves, this study has allowed for the development of a new model for the Taconic Orogeny that helps to explain differences in the timing and spatial relationships between the southern and northern tectophases.

Download or read book The Great American Carbonate Bank written by James Derby and published by AAPG. This book was released on 2013-01-20 with total page 1229 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardcover plus DVD

Download or read book Evolution of Laurussia written by Peter A. Ziegler and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ziegler (geology, U. of Basel, Switzerland) provides an overview of the late Palaeozoic evolution of North America, Europe, the Arctic and North Africa in a plate tectonics framework. The late Palaeozoic evolution of Laurussia is illustrated by a set of ten interpretive palaeotectonic palaeogeograph

Download or read book The Encyclopaedia Britannica written by Hugh Chisholm and published by . This book was released on 1910 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eleventh edition was developed during the encyclopaedia's transition from a British to an American publication. Some of its articles were written by the best-known scholars of the time and it is considered to be a landmark encyclopaedia for scholarship and literary style.

Download or read book The Encyclop dia Britannica written by Hugh Chisholm and published by . This book was released on 1926 with total page 2060 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Encyclopaedia Britannica written by and published by . This book was released on 1910 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Encyclop dia Britannica written by and published by . This book was released on 1910 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Encyclopedia Britannica written by and published by . This book was released on 1922 with total page 2046 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book THE NATIONAL REGISTER written by JERMIAH HUGHES and published by . This book was released on 1846 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Druggists Circular and Chemical Gazette written by and published by . This book was released on 1858 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Farmer written by S. Sands & Wothington and published by . This book was released on 1857 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Moore s Rural New Yorker written by and published by . This book was released on 1902 with total page 894 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Utah Independent written by and published by . This book was released on 1908 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific American written by and published by . This book was released on 1888 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Niles Weekly Register written by Hezekiah Niles and published by . This book was released on 1846 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The American Farmer written by and published by . This book was released on 1857 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Engineering and Mining Journal written by and published by . This book was released on 1884 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: