Read e-book online Glacial Lake Missoula and the Channeled Scabland Missoula, PDF

By Roy M. Breckenridge, Brian F. Atwater, Victor R. Baker, Alan J. Busacca, Richard L. Chambers, Robert R. Curry, Larry G. Hanson, Eugene P. Kiver, Eric V. McDonald, Dale F. Stradling, Richard B. Waitt Jr.

ISBN-10: 0875906192

ISBN-13: 9780875906195

ISBN-10: 1118666933

ISBN-13: 9781118666937

About The Product

Published via the yankee Geophysical Union as a part of the Field journey Guidebooks Series.

In 1933, the 16th consultation of the overseas Geological Congress incorporated an expedition into the Channeled Scabland that used to be ready through J Harlen Bretz of the college of Chicago. Professor Bretz's paintings at the Channeled Scabland coated over forty years. Now, we meet in 1989 at the related topic to work out the facts and vindication of his paintings, and to ascertain new learn in this vital occasion in Quaternary geology.

Content:
Chapter 1 creation (pages 1–2): Roy M. Breckenridge
Chapter 2 Glacial Lake Missoula: Sedimentary facts for a number of Drainages (pages 3–11): Richard L. Chambers and Robert R. Curry
Chapter three decrease Glacial Lakes Missoula and Clark Fork Ice Dams (pages 13–21): Roy M. Breckenridge
Chapter four The Spokane Valley and northern Columbia Plateau (pages 23–35): Eugene P. Kiver, Dale F. Stradling and Victor R. Baker
Chapter five Stratigraphic and Geomorphic facts for Dozens of Last?Glacial Floods (pages 37–50): Richard B. Waitt and Brian F. Atwater
Chapter 6 The Grand Coulee and Dry Falls (pages 51–55): Victor R. Baker
Chapter 7 The list of Pre?Late Wisconsin Floods and overdue Wisconsin Flood positive aspects within the Cheney?Palouse Scabland (pages 57–62): Alan J. Busacca, Eric V. McDonald and Victor R. Baker
Chapter eight The Columbia Valley and Columbia River Gorge (pages 63–67): Larry G. Hanson and Victor R. Baker
Chapter nine References (pages 69–72):

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Extra resources for Glacial Lake Missoula and the Channeled Scabland Missoula, Montana to Portland, Oregon, July 20-26, 1989

Example text

Because the north part of the coulee thus harbored a river-lake as deep as 50 m, outflow from glacial Lake Columbia past Steamboat Rock was sluggish. Overlying the flood gravel (the contact is below the highest lake level) are about 13 flood beds, which become thinner upsection, particularly the top 3 beds (Fig. 7A). The top of each flood bed is a distinctive brown massive silty clay. Most of the flood beds are thinly capped by greenish-gray laminated silt and clay, evidence of long-standing water.

Similar flood gravel deposits in the Spokane arm overlain by rhythmically bedded sediments deposited into a lake are probably mid-Wisconsin or older. The Lamb Draw diamicton is exposed along the right bank for about 4 km at the edge of several low terraces where it overlies the flood gravel with north-dipping foreset beds. 5 m and larger components. Maximum clast size here is 3 m. The diamicton is in turn overlain by flood-reworked fluvial gravels capping the terraces. At reduced reservoir levels and as seen on pre-reservoir air photos, low ridges composed of diamicton extend towards the valley center.

The modeling improves upon the procedure of Baker (1973), and it relies on experience gained with analysis of great floods in many geomorphological settings (O'Connor and Webb, 1988). Probable error in the discharge estimate is in underestimation of discharge, as discussed by Baker and O'Connor (1988). 5 x 107 m3 /sec. Several implications derive from the field data and the calculation illustrated in Figure 4. First, the largest lateglacial Missoula outburst was much bigger than what would be indicated by simple extrapolation modern icedammed lake data (Beget, 1986).

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Glacial Lake Missoula and the Channeled Scabland Missoula, Montana to Portland, Oregon, July 20-26, 1989 by Roy M. Breckenridge, Brian F. Atwater, Victor R. Baker, Alan J. Busacca, Richard L. Chambers, Robert R. Curry, Larry G. Hanson, Eugene P. Kiver, Eric V. McDonald, Dale F. Stradling, Richard B. Waitt Jr.


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