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Yosemite Geology Worksheet

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Yosemite Geology Worksheet

YOSEMITE GEOLOGY ONLINE LESSON

 (PLEASE DO NOT WRITE ON THIS SHEET.  RECORD YOUR ANSWERS ON A SEPARATE SHEET OF PAPER TO TURN IN)

 

Log onto the following site:  http://www.nps.gov/yose/education/

Click on Yosemite at a Glance

 

1.  What is the highest peak at YNP?   How high is it?

 

  1. What is an example of a threatened fauna at YNP?

 

  1. What is an example of an endangered flora at YNP? 

 

Click on Geology

 

  1. What is subduction?   

 

  1. What two types of plates created the Sierra Nevada Range?

 

  1. What type of rock formed 5 million years later?

 

  1. What caused happened to the plate boundaries, about 60 million years ago?

 

  1. What caused the formation of the V-shaped canyons?

 

  1. About 1.2 million years ago, the worlds climate cooled and these structures carved out Yosemites U-shaped valley.  What structure did this? 

 

 Click on Granitic Rocks on the left hand side:

  1. Over 95% of the Rock in Yosemite is _____________________.

 

  1. What does this rock look like?

 

  1. This type of rock contains four minerals what are they (just list them for now).

 

Click on Sierra Nevada Uplift on the left hand side:

  1. What is sedimentary rock?

 

  1. What changed sedimentary rock into metamorphic rock? 

 

  1. Over time, what stripped metamorphic rock and created some of the features of YNP?

 

  1. List three of the features that were formed by these events. 

 

 

 

Click on Valley Formation on the left hand side.

  1. What caused the land east of the Sierra Nevada to stretch?

 

  1. List the three steps of valley formation located in the diagram.

 

  1. Uplift causes the Sierra Nevada to move how far in how many years?

 

  1. What is a glacier and how long ago did it occupy the Yosemite Valley?

 

  1. What is a U-shaped trough?

 

  1. Were Yosemite features such as Lost Arrow or Sentinal Rock affected by glaciers?   How were they formed?

 

  1. What was the last period of glaciation in Yosemite Valley.  How long did it last?

 

  1. What is terminal moraine?

 

  1. What created Lake Yosemite?

 

  1. What two features of Yosemite are separated by moraine?

 

Click on Waterfalls on the top tab. 

 

  1. How long is the Bridalveil Falls watershed?  Where is its source?

 

  1. How often does Bridalveil Falls flow?

 

Click on Dramatic Changes on the left side tab.

 

  1. How does the Yosemite Falls ice cone form?

 

  1. How high does the cone go?

 

Click on How high is high?

1.  Which fall is highest in Yosemite Valley?  Which is lowest? 

     

 

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