missoula flood ppt short - idaho state...

The Great Missoula Floods By Matthew Wilson, ISU Geosciences Geol 402 project,

2004

http://www.iceagefloodsinstitute.org/

www.mines.edu/academic/geology/faculty/klee/missoula.doc

History of Lake MissoulaHistory of Lake Missoula

http://nwcreation.net/articles/missoulaflood.htm

Interesting FactsInteresting Facts

Volume: 2200 cubic Km Volume: 2200 cubic Km (slightly larger than Lake (slightly larger than Lake Erie and Ontario combined) Lake Bonneville 22,000 cubic kmErie and Ontario combined) Lake Bonneville 22,000 cubic km

Area: 7500 square KmArea: 7500 square KmDepth: 700 mDepth: 700 mDischarge: 17 million cubic m/s Discharge: 17 million cubic m/s (would drain lake (would drain lake Erie in eight hours)Erie in eight hours)

Velocity: up to 45 m/s Velocity: up to 45 m/s (100mph)(100mph)

Occurrence: at least 1 of above Occurrence: at least 1 of above magnitudes (40 magnitudes (40 –– 89 smaller floods)89 smaller floods)

Rainbow Lake

4

1

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Evidences of Lake MissoulaEvidences of Lake MissoulaMt Jumbo

Shore lines

Mission Mountains near Flathead LakeMission Mountains near Flathead Lake

http://www.pbs.org/wgbh/nova/megaflood/scab-nf.html

Ripples at Camas Prairie, MontanaRipples at Camas Prairie, MontanaAmplitude: up to 15mAmplitude: up to 15m

Wavelength: up to 150mWavelength: up to 150m


Scablands, northeastern WashingtonScablands, northeastern Washington


Main Channels of FloodMain Channels of Flood

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Dry FallsDry FallsLargest water fall in the world 117mLargest water fall in the world 117m

““Colossal CataractColossal Cataract””


Palouse Falls & GorgePalouse Falls & Gorge56 m. tall56 m. tall

120 m from top of falls to skyline120 m from top of falls to skyline


Multnomah FallsMultnomah FallsColumbia River GorgeColumbia River Gorge

Multnomah Falls in the Columbia River Gorge was created when floodwaters incised the main canyon.


DepositsDeposits

Pendant bar with ripples at confluence of Palouse and Snake Rivers

Fore-sets in bar dip 26 degrees


ErraticsErratics


ReferencesReferencesWeb siteshttp://www.iceagefloodsinstitute.org/trail.htmlhttp://imnh.isu.edu/digitalatlas/counties/bonner/misfld.htmhttp://nwcreation.net/articles/missoulaflood.htmhttp://192.211.16.13/curricular/energies/Aprojfolder/missoula/Title.htmhttp://www.iceagefloodsinstitute.org/http://www.pnl.gov/cms/program/flood.stmhttp://www.pbs.org/wgbh/nova/megaflood/fantastic.htmlhttp://www.pbs.org/wgbh/nova/megaflood/scab-nf.htmlhttp://rickandsidney.com/missoula_flood_research.htmhttp://students.washington.edu/dfinlays/classes/geology201/floodpres/img6.htmwww.mines.edu/academic/geology/faculty/klee/missoula.doc

www.emporia.edu/earthsci/student/corley2/missoula.htm

Parfit, Michael. The floods That Carve the West. The Smithsonian.

missoula flood ppt short - idaho state...

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