Geological Survey of Canada, Current Research (Online) no. 2000-C12
Geological Survey of Canada, Current Research (Online) no. 2000-C12

Author: Lawrence B. Aspler

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 12

ISBN-13: 0660180316

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This report presents results of geologic fieldwork that updates mapping in the Sealhole-Fitzpatrick lakes area west of Hudson Bay, Nunavut, with a focus on the paleogeographic and structural evolution of the Henik, Montgomery, and Hurwitz groups. Along with descriptions of the Archean to Paleoproterozoic rocks and their stratigraphic relationships, the report discusses the area's geologic structure and the evidence for Archean and Paleoproterozoic deformation.

Geological Survey of Canada, Current Research (Online) no. 2002-C10
Geological Survey of Canada, Current Research (Online) no. 2002-C10

Author: Carl A. Ozyer

Publisher: Natural Resources Canada

Published: 2002

Total Pages: 10

ISBN-13: 0660187302

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Ice movement indicators have been carefully documented in the Arrowsmith River area of central mainland Nunavut, and this paper presents preliminary results of this research. It begins with background on the regional geological setting and on the field sampling methods used. Ice movement indicators & associated glacial landforms are then described, including striae, eskers, meltwater channels, moraine systems, and raised shorelines.

Geological Survey of Canada, Current Research (Online) no. 2002-C14
Geological Survey of Canada, Current Research (Online) no. 2002-C14

Author: Trevor G. MacHattie

Publisher: Natural Resources Canada

Published: 2002

Total Pages: 9

ISBN-13: 0660187345

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Komatiite units dominate Archean volcanic successions in the Laughland Lake and Walker Lake map areas of the Committee Bay region, central Nunavut. This study describes results of regional & local mapping of some well-preserved komatiite sequences in those areas, particularly in the Laughland Lake area where the majority of the better-preserved komatiite units are found. Structural & stratigraphic relationships are also discussed.

Geological Survey of Canada, Current Research (Online) no. 2000-A5
Geological Survey of Canada, Current Research (Online) no. 2000-A5

Author: Martin De Keijzer

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 12

ISBN-13: 0660179970

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A well-exposed section about 250 metres wide below the high water line of the Jennings River, Teslin Lake map area in northern British Columbia shows part of the Teslin Fault and provides an opportunity to constrain the fault's kinematic history by direct ground observations. This report describes preliminary structural observations of this section of the Teslin Fault, including the rock types involved, mylonitic & ultramylonitic structures, and deformation. Indications of two main episodes of shearing are discussed.

Geological Survey of Canada, Current Research (Online) no. 2000-A10
Geological Survey of Canada, Current Research (Online) no. 2000-A10

Author: L. C. Struik

Publisher: Natural Resources Canada

Published: 2000

Total Pages: 10

ISBN-13: 0660180022

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The final year of the Nechako NATMAP project to study the geology of central British Columbia was used to research information collected in the field & laboratory, and to compile & document the study results. This article includes a review of upcoming publications & other products, by type of product: maps, journal articles, conference presentations, and computer products, as well as ongoing research on petrology, palaeontology, terrane characterization, tectonics & structure, and Quaternary geology.

Surface Temperature Reconstructions for the Last 2,000 Years
Surface Temperature Reconstructions for the Last 2,000 Years

Author: National Research Council

Publisher: National Academies Press

Published: 2007-01-05

Total Pages: 160

ISBN-13: 0309102251

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In response to a request from Congress, Surface Temperature Reconstructions for the Last 2,000 Years assesses the state of scientific efforts to reconstruct surface temperature records for Earth during approximately the last 2,000 years and the implications of these efforts for our understanding of global climate change. Because widespread, reliable temperature records are available only for the last 150 years, scientists estimate temperatures in the more distant past by analyzing "proxy evidence," which includes tree rings, corals, ocean and lake sediments, cave deposits, ice cores, boreholes, and glaciers. Starting in the late 1990s, scientists began using sophisticated methods to combine proxy evidence from many different locations in an effort to estimate surface temperature changes during the last few hundred to few thousand years. This book is an important resource in helping to understand the intricacies of global climate change.