Download or read book Late Quaternary Ice Flow Stratigraphy and History of the Babine Lake Bulkley River Region Central British Columbia Canada written by Andrew John Stumpf and published by . This book was released on 2001 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quaternary Geology and Till Geochemistry of the Babine Porphyry Copper Belt British Columbia NTS 93L 9 16 M 1 2 7 8 written by Victor Mathew Levson and published by British Columbia Ministry of Forests and Range Forest Scienc. This book was released on 2002 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Fieldwork written by and published by . This book was released on 1999 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quaternary Stratigraphy and Geologic History of the Charlie Lake NTS 94A Map area British Columbia written by Gregory Michael Douglas Hartman and published by . This book was released on 2005 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two Cordilleran and three Laurentide glacial advances are recorded by Quaternary sediments in the Charlie Lake map-area (NTS 94A). The advances are inferred from the presence of exotic clasts derived from the Canadian Shield, fluvial deposits, glaciolacustrine deposits, and tills within nested paleo-valleys excavated during three interglaciations. The Late Wisconsinan Laurentide glaciation was the most extensive Laurentide glaciation, and the only one recognized in western Alberta south of the study area. Coalescence of Late Wisconsinan Laurentide and Cordilleran Ice Sheets is not recognized within the study area. Advancing Late Wisconsinan Laurentide ice blocked the east-flowing drainage and impounded Glacial Lake Mathews within paleo-Peace River valley and its tributaries. More than 100 m of fine sediment, deposited by suspension settling and density underflows were deposited in the centre of the basin. Weak, plastic clay layers within the glaciolacustrine sequence have developed shear planes on which more than 900 landslides have occurred.

Download or read book Late Quaternary Geology and Geochronology of British Columbia Summary and discussion of radiocarbon dated Quaternary history written by John J. Clague and published by . This book was released on 1981 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: "That period of late Quaternary time in British Columbia for which there is radiocarbon dating control is subdivided into three major units: Olympia nonglacial interval (or Olympia Interglaciation), Fraser Glaciation, and the postglacial." --

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quaternary Stratigraphy and Glacial Dynamics from a Core Region of the Laurentide Ice Sheet Aberdeen Lake Kivalliq Nunavut written by Tyler James Hodder and published by . This book was released on 2015 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Central Kivalliq, mainland Nunavut west of Hudson Bay and north of Manitoba, was a long-standing core region of the Laurentide Ice Sheet (LIS). The location of the Keewatin Ice Divide (KID), a major ice spreading region of the LIS, has been shown to have shifted position throughout the Wisconsinan glacial cycle. The surficial record is characterized by near continuous till blanket and cross-cutting streamlined landforms. The occurrence of multi-till stratigraphy across the region raises a number of questions regarding deposition and preservation under a migrating ice divide. This study provides further mapping on the surficial record and investigates the linkages with the subsurface stratigraphy to assess the glacial dynamics evolution throughout the Aberdeen Lake region. This study was motivated by unique access to over 100 drillcores and helicopter based fieldwork, allowing a unique three-dimensional study of the glacial geology record of the Aberdeen Lake region. Field-based mapping of erosional paleo-ice flow indicators, accompanied by remote sensing mapping based on SPOT imagery of subglacial streamlined lineations exhibited a complex surficial history, recording the migration of the KID across the study area. In particular, five paleo-ice flow events are recognized: old WSW (255°) and S (180°) followed by NNW (340°), NW (300°) and finally W (270°) ice flow phases. Landforms corresponding with the NNW, NW and W ice flow phases are recognized. Landforms corresponding to the NNW ice flow phase are part of a larger northward converging landform tract that extends into northern Kivalliq. Southeast of Aberdeen Lake, a paleo-ice stream onset region was interpreted based on the erosional and depositional record observed. Quaternary stratigraphy southeast of Aberdeen Lake can reach up to 71 m in thickness, with till stratigraphy reaching 36 m in thickness. The regional till stratigraphy is grouped into five till lithofacies (Dmm 1-5 - oldest to youngest) based on their texture, geochemistry, lithological signature and colour. Dmm 1 represents an early advance into the region, possibly as a result of the WSW (255°) ice flow phase or could be a preserved depositional imprint of a previous glaciation. Evidence for deposition by an early southerly ice flow phase is recognized within Dmm 2. Dmm 3 and 4 are preceded by a southern migration of the KID and are interpreted to have been deposited by northerly ice flow phases. Dmm 5 is interpreted to be late-glacial in age, corresponding to deposition by NW - W ice flow phases. The northern ice flow phase is responsible for the majority of till production across the study area, reaching a known maximum of approximately 12 m in thickness and representing 45-70% of the stratigraphy thickness logged at across the Tatiggaq target. The recovery of Pitz Fm volcanics within the pebble fraction (4-8 mm) of this till unit south of Qamanaarjuk Lake points to transport distances of at least 55 km from the Baker Lake basin. The extent of large streamlined lineations and associated till production suggests a strong ice flow phase affected the region at a time when the Aberdeen Lake region was not in an ice-marginal setting, but instead a core region of the LIS. Based on the convergent landform imprint and extent, it is suggested this ice flow phase could represent propagation of an ice stream catchment region into central Kivalliq, which could be contemporaneous with southern migration of the KID. Furthermore, it is suggested that the documented late glacial migration of the KID could be a result of competing ice stream catchment areas, with the Hudson Strait Ice Stream catchment becoming more dominant at a later period in time. The propagation of ice stream catchment regions deep into the LIS would suggest that theoretical constructs may be underestimating the proportion of warm-based conditions and erosion/till production that existed during periods of thick ice in central Kivalliq as well as the role of migrating ice divides. This study has provided insight on the glacial dynamics of a former core region of the LIS. The Quaternary stratigraphy was delineated through river bluff and drillcores, emphasizing the dynamics of paleo-ice flow phases which is a necessary first step for successful drift prospecting in this remote region that has known uranium and gold prospects.

Download or read book Quaternary Geology of New Brunswick written by V. N. Rampton and published by . This book was released on 1984 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains a description and explanation of the unconsolidated surficical materials of the Province of New Brunswick, and an account of the geological processes that have been active in shaping this area during Quaternary time.

Download or read book Late Quaternary to Holocene Geology Geomorphology and Glacial History of Dawson Creek and Surrounding Area Northeast British Columbia Canada written by A. S. Hickin and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Northeastern British Columbia was occupied by the Cordilleran (CIS) and the Laurentide (LIS) ice sheets, however, the timing and extent remains contentious. The late Quaternary and Holocene history of this area is examined by exploring geomorphic, stratigraphic, geochemical and geochronologic components of glacial, deglacial, paraglacial and non-glacial landsystems. New tools, such as GIS, LiDAR, and new geochronologic methods, such as optical dating are used to understand the Quaternary geology and geomorphology of the region.Bedrock topography represents the base of the Quaternary section and modelling shows that paleovalleys, common in this region, host extensive Neogene sedimentary records. Stratigraphies from the Murray and Pine valleys indicate glaciation prior to the Mid-Wisconsinan (MIS 3) and during the Late Wiconsinan (MIS 2). Glacial landforms record Late Wisconsinan ice-sheet coalescence and reflect the complex interaction of the LIS and CIS margins. During deglaciation, the LIS and CIS separated and glacial Lake Peace (GLP) formed. Shoreline features enable reconstruction of lake and ice configurations. Four phases of GLP are preserved. Optical ages from Phase II indicate GLP occupied the area some time between ca. 16 - 14 ka yrs ago. The apparent tilt on the shorelines provides a measure of isostatic adjustments and suggests asynchronous retreat of first the LIS, then the CIS.The transition from paraglacial to boreal conditions was driven by climate change and is recorded by vegetation sucession and cessation of paraglacial processes. Optical ages from stabilized dunes and radiocarbon ages from organics date the transition between 12 - 11.5 ka yrs ago with full boreal conditions established by 10 ka yrs ago. The Holocene is dominated by erosional processes, however some systems are aggrading. A case study on a floodplain demonstrates that resistivity (Ohmmapper) surveys provide a grain-size proxy to suppliant GPR studies, which is essential for geophysical fluvial architectural analysis. In the study, the discrepancy between planform style (classic meander model) and subsurface geophysical surveys (indicative of vertical accretion associated with braided and wandering fluvial styles) reiterates cautions that planform may not always be a functions of depositional process and one may not be used to predict the other.

Download or read book American Doctoral Dissertations written by and published by . This book was released on 2001 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Terrain Inventory and Quaternary History of the Pelly River Area Yukon Territory written by Lionel E. Jackson and published by . This book was released on 1994 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Pelly River area is rich in mineral resources including both base and precious metals. This study area is also rich in water, wildlife, forest, recreational, and scenic resources of the upper Pelly, Teslin, and Liard River systems. Future land use conflicts are likely unless careful planning is employed ... The author provides an inventory of surficial deposits of the Pelly River area, describes the processes that modify them, and details the Quaternary history of this area. This report enlarges upon the accompanying Geological Survey of the Canada maps 1790A-1793A (105F), 1794A-1797A 105G), 1819A-1822A (105K), and 1832A-1835A (105J)."--Introduction.

Download or read book Quaternary Stratigraphy of Canada written by Robert J. Fulton and published by Ottawa, Canada : Canadian Government Pub. Centre, Supply and Services Canada. This book was released on 1984 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of regional papers on quaternary glaciation arepresented here under the major section headings of WesternCanada, Arctic Canada, and Eastern Canada.

Download or read book Reconstruction of the Late Pleistocene and Holocene Geomorphology of Northwest Calvert Island British Columbia written by Jordan Blair Reglin Eamer and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents results from a multi-year interdisciplinary study of the Late Quaternary geomorphic history of northwest Calvert Island, British Columbia, Canada. There is a considerable knowledge gap in the region pertaining to Cordilleran ice cover and extent as well as landscape response to a uniquely stable relative sea-level history. The objective of this study was to reconstruct this regional landscape response to deglaciation including post-LGM ice cover and extent, relative sea-level changes, coastal landform development, and climate and ecological variance. Methods used to inform this reconstruction included airborne lidar, aerial photography interpretation, sedimentary stratigraphy and detailed sedimentology of samples from shovel pits and lake cores, surficial geology and geomorphic mapping, palaeoecological examinations, and the development of a geochronology using radiocarbon and optical dating. To assist with landscape reconstruction, a new method was developed and used to differentiate littoral and aeolian sands in sediment samples that range in age from Mid to Late Holocene by using modern reference samples. The method utilized a standard optical microscope paired with freely available software (ImageJ) to characterize grain shape parameters. The method was tested on nearly 6,000 sand grains from samples of known and hypothesized depositional settings and was able to correctly identify the depositional setting for 76% of the samples. After testing, the method was used to differentiate littoral and aeolian sands in a number of shovel pit, exposure, and core sediment samples to give context to stratigraphic and geomorphic interpretations. A short-lived Late Pleistocene re-advance of Cordilleran ice occurred in the study area, with radiocarbon ages indicating ice advanced to, and then retreated from, the western edge of Calvert Island between 14.2 and 13.8 ka cal BP, respectively. Sedimentological and palaeoecological information that suggests a cold climate and advancing/retreating glacier as well as lidar remote sensing and field-based geomorphic mapping of moraines in the region provide evidence of the re-advance. After ice retreated from the area, a broad suite of geomorphic landforms developed, including flood plains,ivaeolian dunes, beaches, spits, marshes, and tombolos. Coastal reworking was extensive, with progradation rates greater than 1 m a-1 occurring in some locations during the Late Holocene. These data provide the first evidence of a re-advance of the retreating ice sheet margin on the central coast of British Columbia, contribute an important methodology to advance Quaternary reconstructions, and give a unique account of the geomorphic development of a Pacific Northwest coastline that experienced little relative sea-level change over the Late Pleistocene and Holocene. Results help fill a spatial and temporal gap in the landscape history of British Columbia and have implications for climate and sea-level reconstructions, early human migration patterns, and the palaeoenvironment of an understudied area of the Pacific Northwest coast of North America.

Download or read book Quaternary Stratigraphy and Glacial History of the Fort Nelson southeast and Fontas River southwest Map Areas NTS 094J SE and 0941 SW Northeastern British Columbia written by Michelle Suzanne Trommelen and published by . This book was released on 2006 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study area in northeast British Columbia extends from the Rocky Mountains in the west to the Fort Nelson Lowland in the east, and includes the westernmost extend of the Laurentide Ice Sheet (LIS) and the easternmost extend of the Cordilleran Ice Sheet (CIS) in the Late Pleistocene. Surficial mapping conducted over portions of the Fontas and Fort Nelson map areas (NTS 094I/SW and 094J/SE, respectively) provides information on sediment distribution and characteristics as well as glacial history. This information has direct implications for geotechnical investigations, aggregate resources and diamond exploration in the region. Non-glacial pre-Late Wisconsinan sediments occur at multiple sites along the Prophet River, providing a pre-glacial or interglacial history for the area. Geochemical analysis and clast lithologies were used to differentiate between sediments derived from the LIS to the east, and Montane/CIS glaciers to the west.The Quaternary stratigraphy of the Prophet River valley indicates the presence of a paleo-Prophet River valley system. Nonglacial deposits in the paleovalley include overbank fines and floodplain sediments interbedded with fluvial gravels. Macrofossils within horizontally laminated organic-rich black clay and silt are interpreted to indicate deposition in the floodplain of the paleo-Prophet River within oxbow-lakes and possibly also sag ponds. The climate is interpreted to be similar to present within a dominantly spruce forest. Wood found at one site provided a radiocarbon date of 49 300?2000 BP, while wood obtained from five other sites provided non-finite radiocarbon ages. In the Late Wisconsinan, the LIS advanced west-southwest into the study area, blocking existing east-flowing regional drainage, and forming an ice-dammed proglacial lake in the Prophet River valley. Ice overrode these sediments and deposited clast-poor clayey-silt till over the entire region. Thicknesses range from less than one metre to greater than twenty metres in the Prophet River valley. In river-cut sections near the Rocky Mountains in the Fort Nelson and Tuchodi Lakes map areas, potassium-feldspar rich granitoid and gneissic clasts, derived from the Canadian Shield, are generally found only east of the foothills, except along the Tetsa River valley. Near the mountain front, in Tuchodi River valley, outwash from Montane/Cordilleran glacial meltwaters was deposited before the LIS advanced and ponded the valley in the Late Wisconsinan.The geochemistry of 303 till samples collected throughout the study area is used to evaluate the regional glacial history inferred from stratigraphic and geomorphic data. Three different geochemical populations are recognized and corroborated by clast lithology (relative percent) from 56 till and glaciofluvial samples. One population, covering the northeast portion of the study area, was likely deposited by the LIS where it extended west into the Rocky Mountain front during the Late Wisconsinan. The second population suggests that the eastern extent of Montane/Cordilleran ice during the Late Wisconsinan was at least to the Rocky Mountain Foothills; however its easternmost position remains unknown. The third population can be attributed to Late Wisconsinan LIS reworking sediment deposited on the Interior Plains by the CIS, either in the Late Wisconsinan or earlier.During early deglaciation, the ice retreated to the east-northeast, impounding local drainage at the ice margin, forming Glacial Lake Prophet in the Fort Nelson map area and Glacial Lake Hay in the Fontas map area. Glacial lakes followed the retreating ice margin and drained through a variety of meltwater channels. The exposed glacial lacustrine plain became a source for sand dunes oriented southeast indicating katabatic paleowinds from the northwest (NTS 094I/SE).

Download or read book Quaternary Environments written by J T Andrews and published by Taylor & Francis. This book was released on 2024-06-28 with total page 803 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1985, Quaternary Environments represents the culmination of Quaternary research in the region of Baffin Island, Baffin Bay and West Greenland over a period of twenty years and it will serve as a timely and complementary balance to the paleo- oceanographic studies in the NE North Atlantic. The region of Baffin Island, Baffin Bay and West Greenland is probably the best place in the world to examine the interactions between ice, land and oceans on timescales of a few hundred to many thousands of years. Two introductory chapters outline the history of research and the physical background. In Part II the evidence for glacial erosion and deposition over the eastern Canadian Arctic is examined and the history of the Baffin Island continental shelf is described. Part III deals with the paleo- oceanography of Baffin Bay and the Labrador Sea through an examination of deep-sea cores dated by several different methods. In Part IV there is a comprehensive account of the stratigraphy of Baffin Island, Bylot Island, and West Greenland, from the Pliocene to the late Wisconsin. Part V examines the climatic effects of the past 10,000 years, considering evidence from pollen analysis, glacier fluctuations, changes of sea level and the response of early (Eskimo) man. This important volume will interest all quaternary scientists, especially those in glaciology, glacial geology, marine geology, and geomorphology.

Download or read book Quadra Sand written by John J. Clague and published by Energy, Mines, and Resources Canada : available from Print. and Pub. Supply and Services Canada. This book was released on 1977 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quadra Sand is a late Pleistocene lithostratigraphic unit with widespread distribution in the Georgia Depression, British Columbia and Puget Lowland, Washington. The unit consists of horizontally and cross-stratified, well sorted sand, minor silt, and gravel. It is overlain by till and related glacial sediments deposited during the fraser Glaciation and is underlain by fluvial, estuarine, and marine sediments deposited during the preceding nonglacial interval.

Download or read book Retreat of the Last Ice Sheets in Northeastern British Columbia and Adjacent Alberta written by William Henry Mathews and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: