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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Occurrence and origins of streamlined forms in central British Columbia

McClenagan, Jerry Donald 03 May 2010 (has links)
The purpose of this research is to gain understanding of the occurrence and origin of streamlined forms in central British Columbia. More than 50,000 landforms, primarily drumlins and crag-and-tail ridges, were digitally mapped over an area covering five 1:250,000 NTS map sheets. Visual Basic programs were written to statistically analyze the streamlined forms database and to simulate site-scale, two-dimensional glacial erosion. Results show three principal ice and/or meltwater flow directions: southeast flows probably originating in the Skeena Mountains, northeast flows from the Coast Mountains and Quanchas Range, and west flows originating east of the Babine and Telkwa Ranges. Rat-tails and striae occur up to 1680 m elevation and record uphill flow to the west in these ranges. Streamlined forms were investigated at outcrop scale (e.g. rat-tails), landform scale (e.g. drumlins) and landscape scale (as defined by closed contours). On bedrock outcrops, cross-cutting striae are common and they both parallel and cross-cut rat-tails. Small rat-tails occur on, and parallel to, larger rat-tails but they do not cross-cut, suggesting a different origin than striae. Rat-tails are interpreted as being formed by subglacial meltwater flows, an interpretation supported by the glacial erosion model. Lowland streamlined forms (e.g. drumlins and crag-and-tails) are interpreted as either glacially-formed ridges subsequently shaped by meltwater floods or as being formed entirely by meltwater floods. This interpretation is largely based on the common occurrence of interconnecting hairpin furrows around these streamlined forms and on the demonstrated association of hairpin furrows with fluvial erosion. The results of topographic analysis indicate that an interconnecting system of valleys separates uplands that can be objectively defined by single (closed) contours. The aspect ratios of the uplands are highly correlated (L/W = 2.38, R2 = 0.89) with values that are similar to those reported for braid bars and erosional residuals thought to have been formed by glacial outburst floods. This upland/lowland landform assemblage may, in places, represent streamlined erosional residuals within braided channel networks formed, at least in part, by subglacial or glacial outburst floods.
42

Surface exposure dating of glacial deposits from the last glacial cycle : evidence from the Eastern Alps, the Bavarian Forest, the Southern Carpathians and the Altai Mountains /

Reuther, Anne U. January 2007 (has links) (PDF)
Univ., Diss.--Regensburg, 2005.
43

Late quaternary glacial and sea level history of the Bernier Bay area, northwestern Baffin Island, N.W.T. /

Hooper, James Matthew, January 1990 (has links)
Thesis (M.Sc.) -- Memorial University of Newfoundland. / Restricted until October 1991. Typescript. Bibliography: leaves 92-97. Also available online.
44

The late quaternary history of Terra Nova National Park and vicinity, Northeast Newfoundland /

Sommerville, Anne A., January 1997 (has links)
Thesis (M.Sc.)--Memorial University of Newfoundland, 1997. / Restricted until November 1998. Bibliography: leaves 237-261. Also available online.
45

Deglaciationen och högsta kustlinjen i norra Dalsland The deglaciation and the highest shoreline in northern Dalsland, western Sweden /

Lind, Bo. January 1983 (has links)
Thesis (doctoral)--Chalmers tekniska högskola, 1983. / Errata slip inserted. Summary in English. Includes bibliographical references (p. 164-171).
46

Spectral and spatial semi-automated detection of thermokarst change in the Alaskan Arctic

Sulewski, Leanne. January 1900 (has links)
Thesis (M.A.)--The University of North Carolina at Greensboro, 2010. / Directed by Roy Stine; submitted to the Dept. of Geography. Title from PDF t.p. (viewed Jul. 19, 2010). Includes bibliographical references (p. 89-93).
47

The physical geography of the Avalon Peninsula of Newfoundland.

Summers, William Francis. January 1949 (has links)
Note: p. 196 missing
48

Glacial geomorphology of the Churchill Falls area, Labrador.

Morrison, Alastair. January 1966 (has links)
No description available.
49

A Comparitive Analysis of Glacial Landforms: Skeidararsandur Iceland and Northwestern Pennsylvania

Arnold, Billie J. 15 January 2014 (has links)
No description available.
50

The glacial geomorphology of the eastern Mealy Mountains, Labrador.

Gray, James Telfer. January 1966 (has links)
Erratics and perched boulders in the summit areas indicate total glaciation of the eastern Mealy Mountains. The widespread absence of frost-weathered detritus and the smoothed bedrock of several summits suggest a complete ice cover during the last major glaciation in southern Labrador. [...]

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