VOLCANIC DIKE
A dike or dyke, is a sheet of rock that is formed in a fracture of a pre-existing rock body. Dikes can be either Magmatic or Sedimetary. Magmatic dikes form when magma flows into a crack then solidifies as a sheet intrusion, either cutting across layers of rock or through a contiguous mass of rock. Clastic dikes are formed when Sediment fills a pre-existing crevice.
Many times between 70 and 20 million years ago, this region experienced great intrusions of magma into the fractures of rocks. Many of the resulting intrusive features can be seen here as a result of erosion processes that has carried away the overlying sedimentary rocks. Dikes that are exposed often appear as dark walls of rock, like the picture below.
Magmatic
Sedimetary
Here in the Heucho Mountain range you will see the type like at GZ troughout the range. Like Guardians of an ancient Fort, they spread far and wide like obstacles, of sorts, protecting the land from an impending invasion.
To prove you have visited GZ please message me using the current system with the answers to the following questions:
1) At GZ , How many of these DIKES can you see?
2) From the brief lesson, what type of Dike is present here.
3) Standing at GZ estimate the height of the tallest and the lenght of the longest one.
4) Describe the colors you see in their make-up.
5) Please take a picture of you with a similar location in the background. They are everywhere, so this won't be hard to do.