Author: Richard Z. Poore
Publisher:
ISBN:
Category :
Languages : en
Pages : 32

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Book Description

Author: Richard Z. Poore
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 40

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Book Description
Climate and paleoceanography of the western Arctic Ocean for the last 1 million years interpreted from our four marine sediment cores.

Author: Richard Z. Poore
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 32

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Book Description

Author: W. C. Mahaney
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 536

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Book Description

Author: J T Andrews
Publisher: Taylor & Francis
ISBN: 1040087361
Category : Science
Languages : en
Pages : 803

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Book Description
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.

Author: Robert J. Fulton
Publisher: Ottawa, Canada : Canadian Government Pub. Centre, Supply and Services Canada
ISBN:
Category : Science
Languages : en
Pages : 222

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Book Description
A collection of regional papers on quaternary glaciation arepresented here under the major section headings of WesternCanada, Arctic Canada, and Eastern Canada.

Author: Kevin Allen Crawford
Publisher:
ISBN:
Category :
Languages : en
Pages : 112

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Book Description
Abstract: The Arctic Ocean plays an important role in modulating the world's climate. Changes in sea-ice albedo and the export of freshwater into the North Atlantic could have serious repercussions to the climate patterns far beyond the Arctic. To understand fully the impacts of the retreating sea-ice cover and the warming Arctic Ocean we need to look into the past for clues. Paleoenvironments of the Arctic Ocean can be reconstructed by using sea-floor sediment constituents, such as paleobiological and mineral components as well as chemical and paleomagnetic parameters. Three cores raised from the Northwind Ridge, north of the Alaskan continental margin, were chosen to investigate sedimentary patterns and related paleoenvironments in the western Arctic Ocean across a time frame from the Holocene to estimated early Pleistocene. These cores show a range of sedimentation rates decreasing from south to north, thus allowing a development of a relatively high-resolution Upper Quaternary stratigraphy at the southern part of the ridge and a lower-resolution, yet longer stratigraphy for its northern part. In addition to this long stratigraphic coverage, the northern core has well-preserved calcareous microfauna, which provides new insights into paleoceanographic environments. All stratigraphic intervals recovered display glacial-interglacial cyclicity expressed in abundances of foraminifera and ice-rafted debris, and variability in stable-isotopic compositions and some chemical elements such as manganese consistent with data from other parts of the Arctic Ocean. In addition to this cyclicity, sedimentary and micropaleontological data from cores under study indicate a step increase in glacial inputs and sea-ice coverage at the end of the Early Pleistocene, co-occurring with a fundamental reorganization of the Earth's climate during the Mid-Pleistocene Transition. The causal relationships between these processes are yet to be investigated.

Author: Arthur S. Dyke
Publisher:
ISBN:
Category : Drift
Languages : en
Pages : 194

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Book Description
This report describes the surficial geology of Prince of Wales Island, Northwest Territories, central Arctic, as a basis for reconstruction of preglacial evolution, glacial history and postglacial history of the landscape.

Author: R. M. Cline
Publisher: Geological Society of America
ISBN: 0813711452
Category : Science
Languages : en
Pages : 636

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Book Description

Author: Ruth Adler
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 106

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Book Description
Abstract: Sediment core HLY0503-08JPC, collected on the HOTRAX'05 expedition, has been sampled in the upper 5 m and reveals a cyclicity that encompasses marine isotope stages (MIS) 1-6, with more detail than seen in other cores from the central Arctic Ocean. Age control is provided by Accelerator Mass Spectrometry 14C and amino acid racemization ages and comparison of other cores with established chronostratigraphy. Cyclic changes in foraminiferal abundance, [delta]18O and [delta]13C values of planktonic foraminifer Neogloboquadrina pachyderma (sinistral) and lithologic variations reflect changes in circulation and depositional environments. Overall, the HLY0503-08JPC record provides the most detailed analysis of Late Quaternary environments in the western Arctic Ocean available to date and strengthens the age model for Arctic Ocean Quaternary stratigraphy.