This is an Earthcache. There is no physical container to be found. Instead, you will have a brief lesson about the Earth itself, while visiting this site.
Answer the questions below to reinforce what you have learned then send the answers to us and you can log this cache.
- What is your elevation at this site?
- Are both a fold and a fault present at GZ?
- What type of rock do you think this is?
- Describe the rock, color, texture, angle, ect.
The above illustration demonstrates what you are observing at GZ.
The intermittent layers of San Andres Limestone and shale at GZ appear to be a collapse structure, or a fold, which constitute the twists and bends in rocks. There is soft sediment deformation of the rocks bending down. You can see chunks of the surrounding horizontal strata if you look closely.
Folds happen deep underground where the rocks are under pressure and temperatures are higher. The tectonic processes put stress on a rock, and the rock bends, instead of breaking
Faults are planes of detachment which is a result of rocks on either side of the displacement slipping past one another.
There faults that move along the direction of the dip plane, or angle, are dip-slip faults. Faults which move horizontally are strike-slips. Faults which show both dip-slip and strike-slip motion are known as oblique-slip faults.
This may occur rapidly, in the form of an earthquake - or may occur slowly, in the form of creep. Faults may range in length from a few millimeters to thousands of kilometers.
Sorces:Usgs.gov/wikipedia