Physical Geography of the  Black Canyon  of Gunnison  National Park By Alexandria LeFebre  Physical Geography – Fall 2011 ...
Contents  <ul><li>Place of Interest </li></ul><ul><li>Erosion by Streamflow </li></ul><ul><li>Transportation  </li></ul><u...
A Place of Interest  <ul><li>The Black Canyon is one of the newest national parks </li></ul><ul><li>Its annual  visitation...
Erosion by Streamflow <ul><li>The Black Canyon was uniquely formed by erosion of streamflow.  </li></ul><ul><li>Erosion pr...
Transportation <ul><li>Any form of down sloping water can carry/transport materials.  </li></ul><ul><li>In the process of ...
Deposition <ul><li>When a river experiences a decrease in velocity or volume, the river discards its bed-load. This is see...
Down Cutting <ul><li>The Black Canyon is identified through the process of down cutting.  </li></ul><ul><li>Down Cutting i...
Perennial Streams  <ul><li>Identifying the Gunnison River as a perennial stream.  </li></ul><ul><li>It’s a permanent land ...
Imprint in Physical Geography <ul><li>The Black Canyon of Gunnison National Park is one iconic land feature that has been ...
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Physical geology of_the_black_canyon_of_gunnison[1]

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Physical geology of_the_black_canyon_of_gunnison[1]

  1. 1. Physical Geography of the Black Canyon of Gunnison National Park By Alexandria LeFebre Physical Geography – Fall 2011 December 4, 2011
  2. 2. Contents <ul><li>Place of Interest </li></ul><ul><li>Erosion by Streamflow </li></ul><ul><li>Transportation </li></ul><ul><li>Deposition </li></ul><ul><li>Down Cutting </li></ul><ul><li>Perennial Streams </li></ul>
  3. 3. A Place of Interest <ul><li>The Black Canyon is one of the newest national parks </li></ul><ul><li>Its annual visitation yearly average to 170,000 visitors dating from the year 2000. </li></ul><ul><li>It was determined a national park on October 21, 1999 </li></ul><ul><li>Displays beautiful views/ Wildlife </li></ul><ul><li>Plentiful activities- Hiking, Water rafting, fishing, etc. </li></ul>
  4. 4. Erosion by Streamflow <ul><li>The Black Canyon was uniquely formed by erosion of streamflow. </li></ul><ul><li>Erosion process </li></ul><ul><ul><li>As a stream enhances in volume and velocity, its ability to transport materials become highly dominate. </li></ul></ul>
  5. 5. Transportation <ul><li>Any form of down sloping water can carry/transport materials. </li></ul><ul><li>In the process of naturally constructing a land feature, in order to make progress, anything in the way of the finished project must be casted out in which transportation is of aid in carrying all unwanted materials downstream. </li></ul><ul><ul><li>Black Canyon’s bed-load </li></ul></ul><ul><ul><ul><li>Sand, gravel ,rock fragments, boulders, debris, etc. </li></ul></ul></ul>
  6. 6. Deposition <ul><li>When a river experiences a decrease in velocity or volume, the river discards its bed-load. This is seen along various parts of the Gunnison river. </li></ul><ul><ul><li>Reduction in velocity occurs when: </li></ul></ul><ul><ul><ul><li>the land lays flat </li></ul></ul></ul><ul><ul><ul><li>river widens in width </li></ul></ul></ul><ul><ul><li>Reduction in volume occurs when: </li></ul></ul><ul><ul><ul><li>area experiences a dry season </li></ul></ul></ul><ul><ul><ul><li>river passes along absorbent land </li></ul></ul></ul>
  7. 7. Down Cutting <ul><li>The Black Canyon is identified through the process of down cutting. </li></ul><ul><li>Down Cutting is the deepening of a valley due to erosion. </li></ul><ul><ul><li>Causes: </li></ul></ul><ul><ul><ul><li>High volume/velocity of river </li></ul></ul></ul><ul><ul><li>Effects: </li></ul></ul><ul><ul><ul><li>Deeper water channel </li></ul></ul></ul><ul><ul><ul><li>“ V” shape in canyon </li></ul></ul></ul><ul><ul><ul><li>Steep walls </li></ul></ul></ul><ul><ul><ul><li>Lowering of streambed </li></ul></ul></ul>
  8. 8. Perennial Streams <ul><li>Identifying the Gunnison River as a perennial stream. </li></ul><ul><li>It’s a permanent land feature that constantly flows year round </li></ul><ul><li>A key component in the survival of wildlife in the area </li></ul>
  9. 9. Imprint in Physical Geography <ul><li>The Black Canyon of Gunnison National Park is one iconic land feature that has been noticed for its renowned fluvial erosion effect that was formed through the millenniums. This will be an eternal topography that will be enjoyed and studied for many more millenniums to come. </li></ul>

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