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YOSEMITE VALLEY

YOSEMITE VALLEY. GENERAL CHARACTERISTICS. Yosemite means ‘grizzly bear’ 7 miles in length 1-2 miles in width Elevation almost exactly 4,000’. Merced river meanders along. 5-10 million yrs ago - a broad valley. The land rises- the valley becomes a canyon

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YOSEMITE VALLEY

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  1. YOSEMITE VALLEY

  2. GENERAL CHARACTERISTICS • Yosemite means ‘grizzly bear’ • 7 miles in length • 1-2 miles in width • Elevation almost exactly 4,000’

  3. Merced river meanders along 5-10 million yrs ago - a broad valley

  4. The land rises- the valley becomes a canyon 5 million years ago, tilting of Sierras

  5. 40-60 miles in length The Ice Age begins, glaciers carve the valley El Portal glacial stage: 1 mya

  6. The last glacier retreats- 30,000 yrs ago

  7. The ice age ends: Lake Yosemite

  8. Yosemite today

  9. Mt Watkins Mirror Lake

  10. NEVADA FALLS

  11. YOSEMITE FALLS

  12. HALFDOME IS A NUNATAK

  13. EL CAPITAN CLIMBING ROUTES Best climbing rock in the world?

  14. YOSEMITE FALLS: WINTER

  15. SUMMARY • Broad-valley stage (5-10 mya) • Canyon stage (5 mya) • Pleistocene glaciation begins (2 mya) • Last glacial stage (Wisconsin) • Lake Yosemite: formed by terminal moraine • El Capitan and Half Dome nunataks

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