Geology of the Innuitian Orogen and Arctic Platform of Canada and Greenland
Geology of the Innuitian Orogen and Arctic Platform of Canada and Greenland

Author: H.P. Trettin

Publisher: Geological Society of America

Published: 1991

Total Pages: 581

ISBN-13: 081375450X

DOWNLOAD EBOOK

Fourteen chapters discuss regional stratigraphy by time intervals from Precambrian to Quaternary, while other chapters describe the geography, geomorphology, tectonics, geophysical characteristics, and resources of the region. A summary chapter includes geologic maps, structural cross-sections, a geotectonic correlation chart, a gravity map, and a location map for exploration wells in the Arctic Islands and northern Greenland. A wealth of additional information is contained on the nine accompanying plates.

Special Report
Special Report

Author: Cold Regions Research and Engineering Laboratory (U.S.)

Publisher:

Published: 1985

Total Pages: 76

ISBN-13:

DOWNLOAD EBOOK

Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska
Periglacial Landforms and Processes in the Southern Kenai Mountains, Alaska

Author: Palmer K. Bailey

Publisher:

Published: 1985

Total Pages: 72

ISBN-13:

DOWNLOAD EBOOK

The distribution and characteristics of periglacial landforms in the southern Kenai Mountains, Alaska, were investigated during the summer of 1979. The principal area of study was a 1300-metre high mountain mass which stood as a nunatak during the last general glaciation. Periglacial features in the area include gelifluction lobes, nivation hollows, cryoplanation terraces, tors, a string bog, and various forms of patterned ground such as sorted circles, sorted polygons, earth hummocks, sorted steps, sorted stripes, and small ice-wedge polygons. Ground temperature measurements indicate that permafrost recently existed in the area but is no longer present. The sorted polygons, cryoplanation terraces, and nivation hollows are relic features which have been inactive for a considerable time. The turf-banked sorted steps and large gelifluction lobes were active until the very recent thawing of permafrost. Cryofraction and frost sorting still are vigorous active processes. Finely jointed bedrock, a previous colder environment, and long exposure in the absence of glacial ice has allowed periglacial processes to be the dominant surface agents both in the principal study area and in similar areas along the western side of the Kenai Mountains. (Author).

Ice Drift, Ocean Circulation and Climate Change
Ice Drift, Ocean Circulation and Climate Change

Author: Jens Bischof

Publisher: Springer Science & Business Media

Published: 2000-11

Total Pages: 254

ISBN-13: 9781852336486

DOWNLOAD EBOOK

The issue of global warming and climate change is of continuous concern. Since the 1970s, it bas been shown that the pack-ice around the Arctic Ocean is thinning, the margin of permafrost is moving north and the vegetation in the high northern parts of the world is changing (the 'greening' of the Arctic). But are these changes the result of human activity or simply regular variations of the Earth's climate system? Over thousands of years, a continuous archive of iceberg and sea ice drift bas formed in the deep-sea sediments, revealing the place of the ice's origin and allowing a reconstruction of the surface currents and the climate of the past. However, the drift of floating ice from one place to another is not just a passive record of past ocean circulation. It actively influences and changes the surface ocean circulation, thus having a profound effect on climate change. Ice Drift, Ocean Circulation and Climate Change is the first book to focus on the interactions between ice, the ocean and the atmosphere and to describe how these three components of the climate system influence each other. It makes clear the positive contribution of paleoclimatology and paleoceanography and should be read by anyone concerned with global warming and climate change.

Receptaculitids
Receptaculitids

Author: Matthew H. Nitecki

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 249

ISBN-13: 1461546915

DOWNLOAD EBOOK

Receptaculitids are extinct high-level fossils that provide a window into the history of life. After the discovery and analysis of a deposit of phosphatized receptaculitids on the Baltic Sea island of Öland, the authors conclude that receptaculitids possess an attribute not found in any other group of organisms, living or fossil.