Download or read book Grain Shape Variation and Sedimentary Processes of the Neogene Quaternary Sediments in Baffin Bay and Labrador Sea written by Yongtang Shan and published by . This book was released on 1989 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Master s Theses in the Natural and Technical Sciences written by and published by . This book was released on 1990 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quaternary Geology of the Southeast Baffin Island Continental Shelf written by D. B. Praeg and published by Geological Survey of Canada. This book was released on 1986 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigation of the Quaternary sediments of the southeast Baffin Island continental shelf using acoustic data supplemented by sample controls (grabs and cores).

Download or read book Proceedings of the Ocean Drilling Program written by Ocean Drilling Program and published by . This book was released on 1989 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petroleum Abstracts Literature and Patents written by and published by . This book was released on 1990 with total page 1416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Glacial Marine Sedimentation written by Bruce F. Molnia and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 843 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of 18 papers describes the glacial-marine sedimentary environment in a variety of temporal and spatial settings. The volume's primary emphasis is the characteri zation of Quaternary glacial-marine sedimentation to show (1) the significant differences that exist between glacial marine environments in different geographic settings and (2) their resulting glacial-marine deposits and facies. Addi tionally, papers describing ancient glacial-marine environ ments are also presented to illustrate lithified analogs of the Quaternary deposits. With the Doctrine of Uniformitarianism in mind (the present is the key to the past), it is hoped that this volume will serve to expand the horizons of geologists working on the rock record, especially those whose primary criteria for recognition of ancient glacial-marine environments is the presence of dropstones in a finer-grained matrix. As the papers presented here show, diamictite is only one of many types of deposits that form in the glacial-marine sedimentary environment. Papers presented in this volume examine the Quaternary glacia1-marine sedimentary picture in subarctic Alaska, Antarctica, the Arctic Ocean, the Kane Basin, Baffin Island, the Puget-Fraser Lowland of Washington and British Columbia, and the North Atlantic Ocean. Ancient glacia1-marine depos its described are the Neogene Yakataga Formation of southern Alaska, the Late Paleozoic Dwyka Formation of the Karoo Basin of South Africa, and the Precambrian Mineral Fork Formation of Utah. For continuity, a paper summar1z1ng the temporal and spatial occurrences of glacial-marine deposits is also presented.

Download or read book Impact of Melt Water Controlled Material Flux on the Sedimentation in the Western Baffin Bay and the Circum Greenland Marginal Seas written by Johanna Hingst and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arctic is highly sensitive to present climate change and is known to be affected by higher degrees of warming than any other region. Since the Arctic is strongly linked to the global climate system by atmospheric and oceanic circulations, it is crucial to learn more about present and possible future environmental changes in the region. Ice sheets, ice caps, and glaciers play an important role in the Arctic system. To learn more about their sensitivity to climate change, the reconstruction of past ice sheet deglaciation patterns is a helpful tool. An interesting research area for ice sheet reconstruction is the Baffin Bay, which is located between Greenland and the Canadian Arctic and connects the Arctic Ocean with the Labrador Sea. Provenance studies on marine sediments from western Baffin Bay can provide insight into past changes in sediment supply and transport pathways and thus give valuable information about regional ice sheet dynamics and palaeoceanographic conditions. This study analyzed the radiogenic Sr, Nd, and Pb isotope composition of the detrital sediment fraction of four sediment cores from western and northern Baffin Bay and the Canadian Arctic Archipelago. Overall, the data of the sediment cores provide new details on the late Pleistocene and Holocene deglaciation history of the Laurentide Ice Sheet and Innuitian Ice Sheet and related changes in sediment transport processes in western and northern Baffin Bay. Further, the identification of changing sediment provenance of detrital material in marine sediment cores from northern Baffin Bay and Barrow Strait helped to determine better the timing of the opening of these Arctic gateways and the inflow of Arctic waters into Baffin Bay.

Download or read book Glacial Marine Sedimentation written by Bruce F Molnia and published by . This book was released on 1983-11-01 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Last Glacial deglacial Variability in Sea Surface Characteristics and Ice Sheet Activities in the Labrador Sea Baffin Bay written by Defang You and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the context of global warming, the accelerated melting of the Greenland Ice Sheet (GrIS) and Arctic sea ice in recent years has led to increased meltwater discharge and subsequent sea-level rise. The meltwater discharge may affect sea surface characteristics in the polar and subpolar regions and potentially yield significant influence on ocean circulation patterns. Additionally, the far-reaching implications of ocean forcings on ice sheet instability and sea ice retreat have also raised considerable attention. To enhance our understanding of the influences of meltwater discharge on abrupt climatic changes and interactions among ice sheet instability, sea ice variability, and sea surface characteristics, it is essential to investigate sedimentary records on different timescales beyond modern observation. To achieve these objectives, we conducted detailed paleoenvironmental reconstructions from three sediment cores: one obtained from the eastern Labrador Sea (Core MSM12/2-05-01) and two others from southern Baffin Bay (Core SL170 and SL174). This study provides new insights into variations in sea surface characteristics and their interactions with ice sheet activities in the Labrador Sea and Baffin Bay during the last glacial-deglacial-Holocene period. Meanwhile, our findings provide more information about the impact of freshwater forcing/ice sheet activities on abrupt climate changes. Furthermore, these findings highlight the significance of oceanic processes within the polar and subpolar regions and their contributions to paleoclimate changes.

Download or read book Glacimarine Environments written by J. A. Dowdeswell and published by . This book was released on 1990 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume examines the processes responsible for sedimentation in modern glaciomarine environments, and how such modern studies can be used as analogues in the interpretation of ancient glaciomarine sequences. Sediments released from glaciers grounded in tidewater, floating ice shelves, ice tongues, icebergs and sea ice form complex sequences governed by glaciological, oceanographic, sedimentary and biogenic controls. Ten per cent of the world's oceans and epicontinental seas contain such active glacimarine environments, but during Cenozoic glacial periods this area was doubled. This book will, therefore, be of relevance to all scientists concerned with high and middle latitude marine environments. The early chapters are concerned largely with processes of sedimentation in modern glacimarine environments; examples are drawn from Alaska, the Canadian Arctic, Svalbard and Antarctica. Studies of ancient sequences, both Cenozoic and pre-Cenozoic, from the Barents Sea, Greenland, Sweden, Alaska and the northwest European continental shelf, form the latter part of the book.

Download or read book Provenance and Sedimentary Processes of Ice scoured Surficial Sediments Labrador Shelf written by Barrie, J. Vaughn and published by St. John's, Nfld. : Memorial University of Newfoundland, Centre for Cold Ocean Research. This book was released on 1985* with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sedimentological and geophysical studies of the surficial geology of the Labrador Sea reveal evidence of sediment origins and transport, mostly ice-rafted, and modern seabed dynamics, in the form of ice scours and a strong hydrodynamic regime.

Download or read book Paleogeography and Sedimentary Development of Two Deep marine Foreland Basins written by Anne Bernhardt and published by Stanford University. This book was released on 2011 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation comprises three chapters focusing on the evolution of marine sedimentary successions that formed as the fill of large submarine channel belts and their tributary systems. These channel belts serve as conduits for gravel- and sand-laden sediment gravity flows along the axes of narrow, elongate foreland basins. In the past, axial channel belts have not been widely recognized in submarine foreland basins (Mutti et al., 2003). However, recent studies have demonstrated the presence of axial channels, 3-8 km in width and > 100 km in length, in a number of marine foredeeps including the Cretaceous Magallanes Basin, southern Chile, and the Tertiary Molasse Basin, northern Austria (De Ruig and Hubbard, 2006; Hubbard et al., 2008, 2009). Additional studies have shown that similar channels are common in submarine trough-shaped basins in other convergent margin settings such as the Peru-Chile trench (Thornburg et al. 1990, Völker et al., 2006), the Hikurangi trough, offshore New Zealand (Lewis and Pantin, 2002), and the Nankai trough, offshore Japan (Fig. 1 in Moore et al., 2007), as well as in modern oceanic rift basins, such as the Maury channel in the Northeast Atlantic Rockall Basin (Cherkis et al., 1973) and the Northwest Atlantic Mid-Ocean Channel (NAMOC) in the Labrador Sea (Hesse et al., 1987, 1990; Hesse, 1989, Klaucke et al., 1998). These occurrences suggest that axial channels may be common sediment transport fairways in elongate deep-water basins in a variety of tectonic settings. This thesis investigates the sedimentary evolution, stratigraphic architecture, and paleogeography of such channel systems in two distinct, yet analogous and complementary research areas: the Magallanes foreland basin in southern Chile, and the Molasse foreland basin in northern Austria. The main objectives of this study are: a)to characterize the processes of submarine sediment transport and deposition in the study areas, b)to explain the associated filling patterns of ancient submarine axial channels and their tributaries, and c)to reconstruct the paleogeography of an ancient seafloor in order to better understand deep-marine sediment dispersal patterns in narrow elongate basins. The Magallanes Basin is a retro-arc foreland basin characterized by a deep-marine filling history from the Cenomanian/ Turonian (Fildani et al., 2003; Fosdick et al., in press) to the Campanian (Chapter 3). The numerous coarse-grained submarine channel and lobe complexes of the Turonian to Campanian Cerro Toro Formation represent a large north-south oriented channel belt that funneled sediment gravity flows along the axis of the foreland basin parallel to the active thrust front (Hubbard et al., 2008). This main axial trunk channel belt was probably fed by at least one, and possibly numerous, tributary channel systems coming off the Andean mountain front to the west. Similarly, sedimentation within the Upper Austrian Molasse Basin during the late Oligocene to early Miocene was largely controlled by an axial trunk channel that was fed by a deltaic system to the west and a tributary system lying along the Inntal fault zone to the southwest (De Ruig and Hubbard, 2006). Three studies were undertaken in order to illuminate the processes and architecture of the fill of submarine foreland basin axial channels: the interaction of submarine debris flows and turbidity currents within the axial channel in the Molasse Basin (Chapter 1), the stratigraphic and architectural evolution of coarse-grained deep-water deposits in a tributary system setting in the Magallanes Basin (Chapter 2), and the paleogeography of the Magallanes Basin axial channel belt and its tributary system and the associated basin-filling pattern over time (Chapter 3). Multiple techniques were combined to achieve these goals, including field mapping, sedimentological analysis of outcrops and rock cores, interpretation of wireline logs and 3D seismic-reflection data, U/Pb dating of zircons, strontium isotope stratigraphy, and a novel approach to lithofacies proportion modeling (Stright et al., 2009).

Download or read book Biostratigraphic Correlation of the Western and Eastern Margins of the Labrador Baffin Seaway and Implications for the Regional Geology written by Henrik Nøhr-Hansen and published by . This book was released on 2016 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quaternary Stratigraphy of North America written by W. C. Mahaney and published by . This book was released on 1976 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Abstracts Volume written by Geological Association of Canada. Meeting and published by . This book was released on 1980 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Glacial to Holocene Development of Baffin Bay Sedimentary Systems Processes Provenances and Patterns written by Emmanuel Okuma and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The enclosed work assesses the impacts of ocean-ice interactions on the sedimentary system in Baffin Bay, a narrow oceanic basin between Greenland and Canada, which was partly surrounded by three major ice sheets during glacial times. Using proxy data from sedimentary archives, a reconstruction of the last deglaciation to Holocene sediment and ice margin dynamics in northern and western Baffin Bay is accomplished. In addition, an overall Baffin Bay-wide assessment of the development of sedimentation patterns linked to ice sheet dynamics since the Last Glacial Maximum is provided.

Download or read book The Late Quaternary Stratigraphy and Sedimentation History of Baffin Bay written by Aksu, Ali Engin and published by 1977 [c1978]. This book was released on 1977 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: