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Tensional fractures forming joint sets and subsequent weathering/erosion. In short, it's not uncommon for competent (i.e., stronger rocks that tend to deform by fracture in the shallow crust) layers to develop extensional fractures that geologists refer to as joints in response to deformation / applied stress. Further, vertically oriented joints are quite common in sedimentary rocks as these reflect extensional fractures formed from compaction resultant from the overburden of later mass deposited on top of them (with the largest direction of stress being oriented vertically, so the rocks deform by forming extensional cracks that "open" in the direction perpendicular to this largest stress). In layered competent rocks, a particular set of joints (where set refers to a sequence of joints that are all roughly parallel) tend to form at a characteristic spacing that will be roughly equal to the layer thickness. Finally, it's not uncommon for multiple joint sets to form, often at moderate angles with respect to each other, i.e., it would be not uncommon to see a set of vertical joints oriented at X degrees with respect to north and then another vertical joint set oriented at X+/-~90 degrees with respect to north.
Schoch observed the sandstones that make up the Yonaguni formation to "contain numerous well-defined, parallel bedding planes along which the layers easily separate. The rocks of this group are also criss-crossed by numerous sets of parallel, vertically oriented joints in the rock. These joints are natural, parallel fractures by which the rectangular formations seen in the area likely formed.
originally posted by: Station27
originally posted by: Justoneman
originally posted by: AlexandrosOMegas
Sometimes finding these geometric blocks means they've found an ancient stone quary. Why in AZ tho I don't know.
Isn't there some areas in the Grand Canyon National Park that have Egyptian names? Illinois area is full of "artifacts" that had them naming the towns and cities.
I grew up in Arizona and never knew about the Egyptian connection. That's pretty cool! But I was born in the Southern Illinois region known as "Little Egypt," and my family moved back there from Arizona. There are lots of connections to Egypt to be found in Little Egypt - cities with the same names as ones found in Egypt - Cairo, Thebes, Karnak, Goshen, Carmi and Dongola. I was born in one of those Egyptian-named towns - Carmi. The mascot for Southern Illinois University is called "Salukis," after the ancient hunting dogs of Egypt, and the first live mascot dog was named "King Tut."
There are architectural parallels to Egypt to be found in Little Egypt - giant obelisks and even design cues in buildings that illustrate and carry on the history of Little Egypt. Such as this VA hospital in Marion, Illinois that looks like an ancient royal burial chamber. The whole structure has an Egyptian theme:
Now that I have become aware of Arizona having ties to Ancient Egypt, I find it interesting to know that the two places I lived in for the longest time both have ties to Egypt.
originally posted by: SchrodingersRat
originally posted by: Quadlink2
What an amazingly beautiful place the USA is.... i have always wanted to visit but my age and health will probably stop that ever happening ...
All the best
I agree! I feel so lucky to live in a country that has such a diverse set of beautiful locations to visit.
And if you liked that video, here's a picture of a place very close by - Zion National Park.
originally posted by: nugget1
a reply to: StokeGnar37
I just came back to give you more kudos!
Every time that guy or his dog gets near the edge my stomach knots up. I'm going to have to grab a glass of wine in order to view the parts I had to skim by.
This ties in nicely with Chan Thomas' 'The Story of Adam and Eve; the cataclysm'., which I'll have to re-read. (Free PDF)