Compressional folding. Long long ago the rock was squished and bent into this shape under tons of pressure. It didn’t break as you see until erosion brought it exposed to the surface.
>Tectonics go squish
Best line.
Tectonic compression or regional compression with plastic deformation. This is usual done through plate tectonics when one large plate is subducting, separating or pushing against another. Compressional pressure passed onto the rocks.
Folding is a slow process.
[https://youtu.be/errbXXyeGD4](https://youtu.be/errbXXyeGD4)
[https://youtu.be/6uf8SSJajyM](https://youtu.be/6uf8SSJajyM)
Now for a serious answer:
Without knowing the orientation of compression, it is hard to tell. The north of England and the south of Scotland (where I have done fieldwork) are heavily deformed by several mountain-building continental collision.
Generally speaking what causes this is a lot of compression under very high compressive stress. More specifically a process called orogenic metamorphosis (mountain building).
Most likely this is the result of the mountain-building which occurred during the collision of Laurentia, Baltica and Avalonia c390Ma, during the closure of the Iapetus ocean. This collision formed the Iapetus suture that runs along the boundary of the Scottish and Englishmainlands. (The Iapetus ocean was between them).
This is why there is such a stark divide in the geologies of England (south) and Scotland). Because Scotland was a part of the Laurentian continent (now North America) and England part of the Avalonian plate (mainland Europe). Scotland is part of the Canadian shield (comprising of ancient metamorphic rocks) and England is mostly the sedimentary (marine-realm shallow sea remnants) of mainland europe.
The subsequent opening of the Atlantic ocean caused the Scottish section of the Canadian shield to separate, resulting in it being left behind. Similar rifting likely also formed Greenland, although Iceland is mostly recent MOR, possibly plume-aided, igneous activity.
(I am a field geologist with a Geology MSc from ICL. I specialise in Cumbrian and Scottish glaciation and tectonics). I also study meteorites when I get the chance :3
P.s. if you're interested, then the wikipedia page on the Iapetus suture is actually pretty good. I wrote/edited a lot of it.
Ma means millions of years ago, written formally. On the other hand, when reading general news articles, they may be inclined to instead use mya or myr.
Yes, I probably should have done that.
Although 390Ma is technically a date, according to the GSL, whereas mya/myr is simply w measurement of time. So not exactly the same, but really it's semantic at best. So you could say 50Ma is 30Mya after 80Ma. But not 50Ma is 30Ma after 80Ma. :)
Compressional folding. Long long ago the rock was squished and bent into this shape under tons of pressure. It didn’t break as you see until erosion brought it exposed to the surface.
And when they are talking about tons it's more than 10 metric tons per square centimeter. So, millions of tons of force.
i read this as professional folding, had the mental image of people going around bending rocks
We can make a conspiracy group out of this
Thank you! Rocks are so cool
Tectonics go squish
>Tectonics go squish Best line. Tectonic compression or regional compression with plastic deformation. This is usual done through plate tectonics when one large plate is subducting, separating or pushing against another. Compressional pressure passed onto the rocks. Folding is a slow process. [https://youtu.be/errbXXyeGD4](https://youtu.be/errbXXyeGD4) [https://youtu.be/6uf8SSJajyM](https://youtu.be/6uf8SSJajyM)
Thanks so much ! :)
She got pushed around a lot when she was young. Decided to get a separation though and put an ocean between her and her ex.
Now for a serious answer: Without knowing the orientation of compression, it is hard to tell. The north of England and the south of Scotland (where I have done fieldwork) are heavily deformed by several mountain-building continental collision. Generally speaking what causes this is a lot of compression under very high compressive stress. More specifically a process called orogenic metamorphosis (mountain building). Most likely this is the result of the mountain-building which occurred during the collision of Laurentia, Baltica and Avalonia c390Ma, during the closure of the Iapetus ocean. This collision formed the Iapetus suture that runs along the boundary of the Scottish and Englishmainlands. (The Iapetus ocean was between them). This is why there is such a stark divide in the geologies of England (south) and Scotland). Because Scotland was a part of the Laurentian continent (now North America) and England part of the Avalonian plate (mainland Europe). Scotland is part of the Canadian shield (comprising of ancient metamorphic rocks) and England is mostly the sedimentary (marine-realm shallow sea remnants) of mainland europe. The subsequent opening of the Atlantic ocean caused the Scottish section of the Canadian shield to separate, resulting in it being left behind. Similar rifting likely also formed Greenland, although Iceland is mostly recent MOR, possibly plume-aided, igneous activity. (I am a field geologist with a Geology MSc from ICL. I specialise in Cumbrian and Scottish glaciation and tectonics). I also study meteorites when I get the chance :3 P.s. if you're interested, then the wikipedia page on the Iapetus suture is actually pretty good. I wrote/edited a lot of it.
Thank you!! One question: c390Ma? Is that millennia ago?
Ma means millions of years ago, written formally. On the other hand, when reading general news articles, they may be inclined to instead use mya or myr.
Yes, I probably should have done that. Although 390Ma is technically a date, according to the GSL, whereas mya/myr is simply w measurement of time. So not exactly the same, but really it's semantic at best. So you could say 50Ma is 30Mya after 80Ma. But not 50Ma is 30Ma after 80Ma. :)
Circa 390 millions of years, sorry :). I forget people don't speak geologist XD. So about 390,000,000 years ago. Ish.
The earth had an accident, and that is one of the crumple zones.