Devil's Backbone EarthCache
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This location is in Backbone State Park, Iowa's first area to be designated as a state park.
The weathered dolomite rock that was deposited and formed during what we now call the Silurian Period is the attraction for this locale. Being able to walk, climb and crawl along these rock surfaces has drawn visitors to this area for decades. It is amazing to think that approximately 430 millions years ago the sedimentation of lime in the shallow tropical seas that once covered this area created the backbone of this park. Water has eroded the backbone of dolomite and created the fractured looks, distinct with ledges and crevices. If you take the time and give the rock formations a close look you will note the fossils of the ancient, once-living creatures of this historic sea.
To receive credit for this visit, I invite you to participate in the following tasks and send the information via email:
1) Get an elevation reading at the given waypoint. Then continue to this waypoint: N 42 36.769 W 091 33.637 and get an elevation reading. What is the rough approximation of slope between these two points?
2) Move to this waypoint: N 42 36.735 W 091 33.641
Describe the colors and texture of the rocks you see here. Speculate as to what causes the pock marks. Venture further, if you dare!
3) What water body is either seen or heard in this area?
4) Upload a picture of you and or your group in an area of your choice as long as you show some of the magnificent backbone dolomite and the spectacular scenery.
Additional Hints
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