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

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Presentation transcript:

YOSEMITE VALLEY

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

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

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

The Ice Age begins, glaciers carve the valley El Portal glacial stage: 1 mya miles in length

The last glacier retreats- 30,000 yrs ago

The ice age ends: Lake Yosemite

Yosemite today

Mt Watkins Mirror Lake

NEVADA FALLS

YOSEMITE FALLS

HALFDOME IS A NUNATAK

EL CAPITAN CLIMBING ROUTES Best climbing rock in the world?

YOSEMITE FALLS: WINTER

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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