Shorelines
by Jon Burch Photography
Title
Shorelines
Artist
Jon Burch Photography
Medium
Photograph - Digital Capture/faa Watermark Will Not Be On Your Finished Photograph.
Description
Glacial Lake Missoula National Natural Landmark is located about 68 miles northwest of Missoula, Montana at the north end of the Camas Prairie Valley, just east of Montana Highway 382 and Macfarlane Ranch. It was designated as a National Natural Landmark in 1966 because it contains the great ripples, often measuring 25 to 50 feet high and 300 feet long, that served as a strong supporting element for J Harlen Bretz's contention that Washington State's Channeled Scablands were formed by repeated cataclysmic floods over only about 2,000 years, rather than through the millions of years of erosion that had been previously assumed.
The lake was the result of an ice dam on the Clark Fork caused by the southern encroachment of a finger of the Cordilleran Ice Sheet into the Idaho Panhandle at the present day location of Clark Fork, Idaho at the east end of Lake Pend Oreille. The height of the ice dam typically approached 2,000 feet, flooding the valleys of western Montana approximately 200 miles eastward. It was the largest ice-dammed lake known to have occurred in recent geologic history.
The periodic rupturing of the ice dam resulted in the Missoula Floods - cataclysmic floods that swept across Eastern Washington and down the Columbia River Gorge approximately 40 times during a 2,000 year period. The cumulative effect of the floods was to excavate 50 cubic miles of loess, sediment and basalt from the channeled scablands of eastern Washington and to transport it downstream. These floods produced canyons and other large geologic features through cataclysms rather than through more typical gradual processes.
Ordered photographs will not contain the FAA watermark.
Image copyright 2016 Jon Burch Photography all rights reserved.
Uploaded
December 22nd, 2016
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