idaho geology the middle rockies.  middle rockies

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Post on 17-Dec-2015




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  • Idaho Geology The Middle Rockies
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  • Middle Rockies
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  • Middle Rockies Ranges that are separated by broad valleys and plateaus (remember this description!). The ranges are the dominant features. Opposite description of Basin and Range Peaks in 8-10,000 ft. range
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  • Geologic Origins Folding for some ranges Faulting for some ranges (rows of fault blocks like B&R) Both folding and faulting for some ranges
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  • Folding
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  • Fault mountains may be simple horst and graben situations, or larger tilted fault blocks
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  • Grand Tetons Big Hole Mountains Caribou Mountains Blackfoot Mountains Portneuf Mountains Bear River Mountains Mountain ranges
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  • Blackfoot Mountains
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  • Caribou Mountains Greys Lake in foreground
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  • Portneuf Range
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  • Bear River Mountains
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  • Grand Tetons
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  • Recognize this?
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  • Blackfoot River Portneuf River Bear River Grays River Snake River Teton River Henrys Fork Rivers are important to this region
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  • The Snake River begins in Jackson Lake, Wyoming, before flowing into Idaho The first few miles in Idaho the river is actually Palisades Reservoir behind Palisades Dam, which controls floods and serves agricultural purposes (irrigation) as well as recreational needs (see next page).
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  • Palisades ReservoirPalisades Dam
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  • The Teton River flowing through Teton Valley
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  • Henrys Fork, one of the worlds premier fishing streams
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  • Portneuf River
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  • Blackfoot River Reservoir Grays Lake
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  • One of Idahos largest lakes, it is half in Utah
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  • The Bear River drains the Middle Rockies around Bear Lake and the Bear River Mountains. It also drains the Eastern part of the Basin and Range
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  • Soda Springs was so named because of large phosphate deposits discovered and mined there even today. Phosphate Mining
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  • Phosphate Refining
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  • Baking reaction with sodium bicarbonate to produce carbon dioxide (CO2) Colas-Phosphoric Acid for fizz Toothpaste-Dicalcium Phosphate Dihydrate as an abrasive Tooth Gels-Sodium Tripolyphosphate as a whitening agent Car Wash/dishwashing detergent-Sodium Tripolyphosphate which softens water, removes soils and keeps soil from redepositing
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  • Fire Extinguishers-Mono- and Di- ammonium Phosphates as a fire retardant Latex Paint-Sodium Potassium Tripolyphosphate, Potassium Tripolyphosphate as a dispersing agent Fertilizers-Ammonium Phosphate as nutrient for plant growth Synthetic Rubber-Tetrapotassium Pyrophosphate as a catalyst Photocopier Toner-Tricalcium Phosphate as a dispersing agent Dyeing Wool-Diammonium Phosphate for control of pH in dye bath to allow even penetration of dye through the wool Explosives and pyrotechnics
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  • Climate Fairly moderate and dry Summer average = 80 degrees Winter average low of 8 degrees Precipitation = 15 (at elevation) Snowfall heavy = 73 (at elevation) Rainshadow effect!
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  • Vegetation Grassy valleys with irrigated farming between ranges Forested hills with most trees in moister low points Little vegetation on drier ridges Open forest encourages grazing/browsing
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  • Towns and Cities
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  • The End