Quaternary geology and geomorphology of northwestern Manitoba:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | Undetermined |
| Veröffentlicht: |
Ottawa u.a.
1986
|
| Schriftenreihe: | Geological Survey of Canada: Memoir
418 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | 38 S. |
| ISBN: | 0660121638 |
Internformat
MARC
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| 100 | 1 | |a Dredge, Lynda A. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Quaternary geology and geomorphology of northwestern Manitoba |c L. A. Dredge ; F. M. Nixon ; R. J. Richardson |
| 264 | 1 | |a Ottawa u.a. |c 1986 | |
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Datensatz im Suchindex
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| adam_text | Titel: Quaternary geology and geomorphology of northwestern Manitoba
Autor: Dredge, L. A.
Jahr: 1986
CONTENTS
1 Abstract/Resume
2 Introduction
2 General
2 Field work
3 Scope of the report
3 Acknowledgments
3 Previous work
3 Physiography
3 Bedrock topography and landforms
Glacial topography and landforms
5 Drainage
5 Physiographic units
5 Climate
6 Surficial geology
6 Glaciated bedrock outcrop
6 Lithology
6 Abrasion and weathering
6 Striae
6 Residuum
6 Felsenmeer
7 Saprolite and reworked saprolite
7 Till
8 Tills emplaced by Keewatin Ice
8 Sandy till
10 Bouldery till
11 Till veneer
11 Tills emplaced by Hudsonian Ice
11 Silty till
12 Glaciofluvial deposits
12 Crevasse fillings
12 Kames and eskers
12 Interlobate kame moraine
13 Radial and lateral kame moraines, and eskers
14 Outwash
14 Glaciolacustrine and lacustrine deposits
15 Glaciolacustrine deposits
15 Lacustrine pelite
17 Littoral sand
18 Glaciomarine and marine deposits
18 Stony marine and glaciomarine pelite
18 Littoral and sublittoral sands
18 Undifferentiated marine deposits
18 Fluvial deposits
18 Modern alluvium
18 Older alluvium
19 Organic deposits (peat)
19 Forested bog peat
19 Fen peat
19 Tundra peat
20 Stratigraphy
20 Morand Lake and Gimby Lake exposures
20 Seal River sections
20 North Knife River sections
20 Sediment sequence and interpretation of events
21 Chronology and regional correlations
21 Summary
21 Glacial and postglacial history
23 Ice flow indicators
23 Continental context
23 Early glaciations and nonglacial intervals
23 Late Wisconsinan glaciation
23 Limits of Keewatin and Hudsonian ice
23 Changes in flow direction
25 Regime of Hudsonian and Keewatin ice masses during late phases of glaciation
26 Deglaciation
26 Overview: extent and deposits of Lake Agassiz
26 Overview: style and pattern of ice retreat
28 Rupture of the suture between Keewatin and Hudsonian ice
29 Early high-level lake
30 M oney Lake phase
30 The 377 m lake level and eastward extension of the interlobate moraine
30 Sandy Lake phase: deepening of Lake Agassiz
30
30
31
31
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3*
36
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in pocket
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Maximum expansion of Lake Agassiz
Shifting ice divide and the Quinn Lake readvance
Gradually falling lake levels
Abrupt drops in lake level
A possible late, low-level phase: Lake Netterville
Readvance and catastrophic demise of Hudsonian ice: the end of Lake Agassiz
Shift in the Keewatin ice divide and development of isolated glacial lakes
Radial recession of Keewatin ice to a final centre near Hudson Bay
Tyrrell Sea episode
Postglacial climate changes
Correlation of northern and southern Lake Agassiz levels
Economic and engineering geology
Introduction
Land use concerns
Sand and gravel
Foundering of equipment in loose till
Permafrost and ground ice
Peatlands
Construction problems related to permafrost conditions
Introduction
Base metal concentrations
Location of anomalies
References
Tables
1. Diatoms in Lake Agassiz deposits, northwestern Manitoba
2. Stratigraphic table showing the sedimentary succession along North Knife River,
with several possible interpretations of events and chronologies
3. Contrasting deposits and landforms associated with Keewatin and
Hudsonian ice retreating against Lake Agassiz
4. Sea, ice, and lake relationships
Illustrations
Map 1608A. Surficial geology, northwestern Manitoba
1. Location map
2. Topography, drainage, and physiographic regions
3. Rock blister
4. Boulder patch
5. Felsenmeer
6. Till texture
7. Sedimentary structures in sandy Keewatin till
8. Sandy till plain, aerial view
9. Sandy till, ground view
10. Active mudboil in sandy till
11. Bouldery till, aerial view
12. Bouldery till, ground view
13. Ribbed moraine
14. Crevasse fillings
15. Radial and ice front marginal kame moraine
16. Sandy, gently convex surface of esker ridge
17. Esker with delta pad
18. Cross-section of esker ridge
19. Outwash channels
20. De Geer moraine
21. Ice laminae in lacustrine silt
22. Landscape in the Lake Agassiz basin near South Knife River
23. Beach ridges in sandy till; beach ridges in littoral sand
24. Forested bog and fen landscape
25. Forested bog
26. Palsa in fen
27. Tundra peat with frost polygons, and sandy till
28. Gathering grounds and migrating ice divides of the
Late Wisconsinan glaciation
29. Ice flow patterns
30. Sedimentation pattern in the Lake Agassiz Basin
31. Pattern of ice retreat in northern Manitoba
32. Deglaciation of northern M anitoba
33. Areas inundated by Lake Agassiz, isolated glacial lakes, and the Tyrrell Sea
34. Late phases of Lake Agassiz in M anitoba
35. Lake level summary for the northern part of Lake Agassiz
36. Uranium and base metal concentrations in till
37. Location of uranium and base metal anomalies
|
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| geographic_facet | Manitoba Nordwest |
| id | DE-604.BV000535241 |
| illustrated | Not Illustrated |
| indexdate | 2024-07-09T15:15:22Z |
| institution | BVB |
| isbn | 0660121638 |
| language | Undetermined |
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| physical | 38 S. |
| publishDate | 1986 |
| publishDateSearch | 1986 |
| publishDateSort | 1986 |
| record_format | marc |
| series | Geological Survey of Canada: Memoir |
| series2 | Geological Survey of Canada: Memoir |
| spelling | Dredge, Lynda A. Verfasser aut Quaternary geology and geomorphology of northwestern Manitoba L. A. Dredge ; F. M. Nixon ; R. J. Richardson Ottawa u.a. 1986 38 S. txt rdacontent n rdamedia nc rdacarrier Geological Survey of Canada: Memoir 418 Geomorphologie (DE-588)4130684-3 gnd rswk-swf Quartär (DE-588)4048009-4 gnd rswk-swf Manitoba Nordwest (DE-588)4441404-3 gnd rswk-swf Manitoba Nordwest (DE-588)4441404-3 g Quartär (DE-588)4048009-4 s DE-604 Geomorphologie (DE-588)4130684-3 s Geological Survey of Canada: Memoir 418 (DE-604)BV035921199 418 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=000330327&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Dredge, Lynda A. Quaternary geology and geomorphology of northwestern Manitoba Geological Survey of Canada: Memoir Geomorphologie (DE-588)4130684-3 gnd Quartär (DE-588)4048009-4 gnd |
| subject_GND | (DE-588)4130684-3 (DE-588)4048009-4 (DE-588)4441404-3 |
| title | Quaternary geology and geomorphology of northwestern Manitoba |
| title_auth | Quaternary geology and geomorphology of northwestern Manitoba |
| title_exact_search | Quaternary geology and geomorphology of northwestern Manitoba |
| title_full | Quaternary geology and geomorphology of northwestern Manitoba L. A. Dredge ; F. M. Nixon ; R. J. Richardson |
| title_fullStr | Quaternary geology and geomorphology of northwestern Manitoba L. A. Dredge ; F. M. Nixon ; R. J. Richardson |
| title_full_unstemmed | Quaternary geology and geomorphology of northwestern Manitoba L. A. Dredge ; F. M. Nixon ; R. J. Richardson |
| title_short | Quaternary geology and geomorphology of northwestern Manitoba |
| title_sort | quaternary geology and geomorphology of northwestern manitoba |
| topic | Geomorphologie (DE-588)4130684-3 gnd Quartär (DE-588)4048009-4 gnd |
| topic_facet | Geomorphologie Quartär Manitoba Nordwest |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=000330327&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV035921199 |
| work_keys_str_mv | AT dredgelyndaa quaternarygeologyandgeomorphologyofnorthwesternmanitoba |