idaho geology the middle rockies.  middle rockies

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  • Slide 1
  • Idaho Geology The Middle Rockies
  • Slide 2
  • Middle Rockies
  • Slide 3
  • 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
  • Slide 4
  • Geologic Origins Folding for some ranges Faulting for some ranges (rows of fault blocks like B&R) Both folding and faulting for some ranges
  • Slide 5
  • Slide 6
  • Folding
  • Slide 7
  • Fault mountains may be simple horst and graben situations, or larger tilted fault blocks
  • Slide 8
  • Grand Tetons Big Hole Mountains Caribou Mountains Blackfoot Mountains Portneuf Mountains Bear River Mountains Mountain ranges
  • Slide 9
  • Blackfoot Mountains
  • Slide 10
  • Caribou Mountains Greys Lake in foreground
  • Slide 11
  • Portneuf Range
  • Slide 12
  • Bear River Mountains
  • Slide 13
  • Grand Tetons
  • Slide 14
  • Recognize this?
  • Slide 15
  • Blackfoot River Portneuf River Bear River Grays River Snake River Teton River Henrys Fork Rivers are important to this region
  • Slide 16
  • 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).
  • Slide 17
  • Palisades ReservoirPalisades Dam
  • Slide 18
  • The Teton River flowing through Teton Valley
  • Slide 19
  • Henrys Fork, one of the worlds premier fishing streams
  • Slide 20
  • Portneuf River
  • Slide 21
  • Blackfoot River Reservoir Grays Lake
  • Slide 22
  • One of Idahos largest lakes, it is half in Utah
  • Slide 23
  • 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
  • Slide 24
  • Soda Springs was so named because of large phosphate deposits discovered and mined there even today. Phosphate Mining
  • Slide 25
  • Phosphate Refining
  • Slide 26
  • Slide 27
  • 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
  • Slide 28
  • 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
  • Slide 29
  • 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!
  • Slide 30
  • Rainshadow Effect IDAHO CASCADES AND SIERRA NEVADA WASH/ORE
  • Slide 31
  • 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
  • Slide 32
  • Slide 33
  • Slide 34
  • Towns and Cities
  • Slide 35
  • The End