Download or read book Quaternary Sediment Maps of the Gulf of St Lawrence written by Geological Survey of Canada and published by . This book was released on 1990 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quaternary Sediment Maps of the Gulf of St Lawrence written by Heiner W. Josenhans and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlas of Submarine Glacial Landforms written by J.A. Dowdeswell and published by Geological Society of London. This book was released on 2016-12-16 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: New geophysical techniques (multibeam echo sounding and 3D seismics) have revolutionized high-resolution imaging of the modern seafloor and palaeo-shelf surfaces in Arctic and Antarctic waters, generating vast quantities of data and novel insights into sedimentary architecture and past environmental conditions. The Atlas of Submarine Glacial Landforms is a comprehensive and timely summary of the current state of knowledge of these high-latitude glacier-influenced systems. The Atlas presents over 180 contributions describing, illustrating and discussing the full variability of landforms found on the high-latitude glacier-influenced seafloor, from fjords and continental shelves to the continental slope, rise and deep-sea basins beyond. The distribution and geometry of these submarine landforms provide key information on past ice-sheet extent and the direction and nature of ice flow and dynamics. The papers discuss individual seafloor landforms, landform assemblages and entire landsystems from relatively mild to extreme glacimarine climatic settings and on timescales from the modern margins of tidewater glaciers, through Quaternary examples to ancient glaciations in the Late Ordovician.
Download or read book Quaternary Glaciations Extent and Chronology written by J. Ehlers and published by Elsevier. This book was released on 2004-10-02 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the second of three volumes in which the recent knowledge of the extent and chronology of Quaternary glaciations has been compiled on a global scale. This information is seen as a fundamental requirement, not only for the glacial community, but for the wider user-community of general Quaternary workers. In particular the need for accurate ice-front positions is a basic requirement for the rapidly growing field of palaeoclimate modelling. In order to provide the information for the widest-possible range of users in the most accessible form, a series of digital maps was prepared. The glacial limits were mapped in ArcView, the Geographical Information System (GIS) used by the work group. Included with the publication is a CD with digital maps, showing glacial limits, end moraines, ice-dammed lakes, glacier-induced drainage diversions and the locations of key sections through which the glacial limits are defined and dated. The last deglaciation is also shown in 500 year time-steps. The digital maps in this volume cover the USA and Canada and include Greenland and Hawaii. Both overview maps and more detailed maps at a scale 1: 1,000,000 are provided. Also available:Part I: Europe, ISBN 0-444-51462-7Part III: South America, Asia, Africa, Australia, Antarctica, ISBN 0-444-51593-3
Download or read book Morphology and Sediments of the Gulf of St Lawrence written by Douglas Howard Loring and published by . This book was released on 1973 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes and assesses the submarine morphology and the characteristics of the sediments (lithology, grain size, mineralogy, and chemistry) of the Gulf of St. Lawrence and the marine estuary of the St. Lawrence River. The Gulf of St. Lawrence is an inland sea of triangular shape which occupies an area of approximately 96,000 square miles. It has an irregular submarine topography composed of long troughshaped valleys and shelves of varying widths and relief. Acoustical and sampling data indicate that the submarine topography is controlled by the lithology and structure of the underlying bedrock and an uneven cover of unconsolidated sediments. Fine-grained sediments referred to as pelites occupy the floors of the major troughs and shelf valleys and sediments of coarser grain sizes (sands and gravels) form the cover on the trough slopes and the adjacent shelves. Continuous seismic profiles and sediment cores from various parts of the Gulf reveal that glacial drift occurs beneath the surface sediments in many parts of the Gulf. Along the southern edge of the Laurentian Trough adjacent to the Magdalen Shelf these glacial sediments form a thick wedge composed of a series of coalescing fans. Mineralogical and chemical data indicate that the sediments have been derived from underlying sedimentary rocks (calcareous and noncalcareous) as well as from crystalline rocks of the Canadian Shield to the north and west and that Wisconsin glaciations have been the most important single factor in controlling the dispersal pattern of terrigenous material in the Gulf. The geological, morphological, and sedimentological data indicate that the main stages in the development of the present morphology and sediments in the Gulf are (1) the formation of a preglacial landscape, (2) modification of the landscape by repeated glaciations during the Pleistocene Epoch, (3) late-glacial (late-Wisconsin) ice readvances and retreats, and (4) modification of the relict glacial morphology and sediments by postglacial changes in sea level and by present depositional conditions. At the present, specific sedimentary environments of deposition, active redistribution and nondeposition of terrigenous material occur in the Gulf.
Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 2016 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drift Exploration in Glaciated Terrain written by Geological Society of London and published by Geological Society of London. This book was released on 2001 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes the use of till geochemical and indicator mineral methods for mineral exploration in the glaciated terrain of Canada. The principles and examples described in this volume will have direct applications for exploration companies looking for diamonds, precious and base metals and uranium in glaciated parts of North America, northern Europe and Asia and mountainous regions of South America.
Download or read book Science Review written by Bedford Institute of Oceanography and published by . This book was released on 1992 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glaciated Margins written by D.P. Le Heron and published by Geological Society of London. This book was released on 2019-04-08 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the sedimentary and geophysical archive of glaciated margins is a complex task that requires integration and analysis of disparate sedimentological and geophysical data. Their analysis is vital for understanding the dynamics of past ice sheets and how they interact with their neighbouring marine basins, on timescales that cannot be captured by observations of the cryosphere today. As resources, sediments deposited on the inner margins of glaciated shelves also exhibit resource potential where more sand-dominated systems occur, acting as reservoirs for both hydrocarbons and water. This book surveys the full gamut of glaciated margins, from deep time (Neoproterozoic, Ordovician and Carboniferous–Permian) to modern high-latitude margins in Canada and Antarctica. This collection of papers is the first attempt to deliberately do this, allowing not only the similarities and differences between modern and ancient glaciated margins to be explored, but also the wide spectrum of their mechanisms of investigation to be probed. Together, these papers offer a high-resolution, spatially and temporally diverse blueprint of the depositional processes, ice sheet dynamics, and basin architectures of the world’s former glaciated margins; a vital resource in advancing understanding of our present and future marine-terminating ice sheet margins.
Download or read book Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1982 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey of Canada Open File 2419 written by and published by Natural Resources Canada. This book was released on with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glaciotectonic Landforms and Structures written by J. S. Aber and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey Bulletin written by and published by . This book was released on 1973 with total page 1324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts of North American Geology written by Geological Survey (U.S.) and published by . This book was released on 1971-07 with total page 1178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geophysical Abstracts written by and published by . This book was released on 1966 with total page 1270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glaciated Coasts written by Duncan M. Fitzgerald and published by Elsevier. This book was released on 2013-09-03 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glaciated Coasts is a collection of articles that deals with shoreline morphologies of glaciated coasts and the processes that formed these coastlines in North America. This book examines nonsandy shorelines and covers a range of geologic and geographic coastal settings in a northern-southern order. This text investigates and compares the glaciated northern shorelines. These shorelines north of the glacial limit are mostly of the primary form in different stages of modification by marine agents. Shorelines are associated with embayments; baymouth barriers in turn enclose embayments. This book describes beaches as having coarse or mixed sediment populations. Most beaches worldwide have gravel clasts that have been rounded and sorted by marine processes. In the southeastern coast of Alaska, active tectonics on a mountainous shoreline is evident. The region also shows emergent and submerging shorelines with a glacial imprint undergoing formation by modern processes. This book also gives examples of gravel beach environments in various coastal settings. This book can prove useful for students of meteorology, oceanography as well as to marine ecologists and biologists. It can also benefit readers whose interest lie with coastal environment or with the general earth sciences.
Download or read book Geophysical Abstracts written by Geological Survey (U.S.) and published by . This book was released on 1967 with total page 1278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
