| Please send me the answers to the following question: |
| Posted Coords: |
1) What two things do you need to create a dune?
2) As you climb Mt. Pisgah count the steps. If each step is 7 inches high, what is the height of this dune? (7 inches x B steps = height in inches; divide that by 12 to get feet). |
| Stage 2: |
|
3) Do you feel the wind blowing? Which direction is it coming from?
4) What natural measure is in place to keep this dune in place?
5) Post a picture of you or a signature item at the posted coords.
|
Mt. Pisgah
At the posted coordinates, you are standing at the base of Mt. Pisgah. Mt. Pisgah is a perched dune that is thousands of years old. For this earthcache, you're going to learn how this dune formed and check out the incredible view it offers.
Where did you come from, where did you go?
Long ago, glaciers covered this area. They would advance south, and then retreat north again. This happened several times with the glaciers reaching down into Indiana, before eventually retreating all the way into Canada. As the glaciers advanced and retreated they would pick up rocks and other debris, which would embed in the glacier. The glaciers would carve out river basins, and the Great Lakes. As they retreated, they would leave debris behind. Some of that debris is the sand on the shores of Lake Michigan.
The sand is made up of quartz, pink or white grains of feldspar, black magnetite and hornblende, red garnet and green epidote.
How to build a sand dune
After the sand was deposited by the glaciers, and the Great Lakes began to fill in with water, the dunes began to form. Winds from the west would blow the tiny particles of sand inland. If these tiny grains of sand got hung up on some obstacle (a rock or grass), a dune would begin to form. As more and more sand was blown inland, the dune would grow in size. More grass would take root, and the dune would continue to grow and grow.
| Please send me the answers to the following question: |
| Posted Coords: |
1) What two things do you need to create a dune?
2) As you climb Mt. Pisgah count the steps. If each step is 7 inches high, what is the height of this dune? (7 inches x B steps = height in inches; divide that by 12 to get feet). |
| Stage 2: |
|
3) Do you feel the wind blowing? Which direction is it coming from?
4) What natural measure is in place to keep this dune in place?
5) Post a picture of you or a signature item at the stage 2 coords.
|
Resource:
https://www.nps.gov/slbe/learn/kidsyouth/dunes.htm