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Cornish geology
"The rocks of Cornwall have an amazing story to tell. They have been on a journey of 8,000 miles in just 400 million years. This journey has included tropical seas, deserts, volcanic eruptions and hot granites, mineral vapours rich in tin and copper and ever changing climate and sea levels" - Wildlife Trust.
In the Ordovician, the Rheic Ocean opened. The Avalonian superterrane broke away and took what is now southern Britain with it. It moved northwards. Then it broke up, forming Avalonia, Iberia (Spain) and Armonica. Cornubia was part of southern Avalonia. It had been uplifted during the Cadomian Orogeny while the superterrane still existed. This gave it an E-W fold trend and series of basins called Pretannia. The basin was metamorphic, plutonic and volcanic rocks that formed a magmatic arc. Now only isolated outcrops of the basement are visible, and one of them is the Man of War Gneiss, located in the Lizard complex of southern Cornwall.
The accretion of Avalonia with Baltica during the early Silurian created a NW-SE trending series of wrench faults, a type of strike-slip fault that has vertical displacement that runs very deep. These faults have been instrumental in forming sedimentary basins and influenced granite displacement. They are still strongly influential on the geology of SW Britain.
The Caledonian-Appalachian Orogeny saw the closing of the Iapetus Ocean at the end of the Silurian. This was caused by the accretion of Laurentia and Avalonia/Baltica. (Laurentia = N America, Greenland and part of W Europe including Ireland and central Britain; Avalonia = S Britain; Baltica = Denmark and Scandanavia) . Caledonian/Appalachian Orogeny => formation of Old Red Sandstone (Scotland, Wales)=> unification of central and southern Britain => Appalachian mountains (Acadian phase).
During the Variscan Orogen at the end of the Carboniferous, Gondwanaland collided with Laurasia to form Pangaea. An E to W trending fold belt was created. Cornubia is believed to have been part of Gondwanaland.
Funny how my son lives in mountains which were formed by the slamming of this place with that one. Simply put.
There are many sites of "geologic interest" in the area, chockablock full of fossils. Here is one (click on image to see bigger):
We went to Wicken Fen on Sunday. We decided when we woke up, spur of the moment. The day promised to be a warm and sunny as Saturday, even though the BBC weather said it would cloud up and rain later (which it did yesterday instead). I have been there once before, in 2007, and it was bloody cold that day. Much nicer without freezing temps and three layers of clothes.
Ms Peel asked me if I have been following the hogwash about the MPs over here in the UK. I have. She is right, the conversations you can have about it are interesting. Masha and I enjoy the latest and juiciest items unveiled daily by the media. Like the US auto CEOs' and the bank execs' shenanigans, it is humorous, entertaining, and downright disgusting that these people in a position of power will steal with such an arrogance, while many struggle to hang on to their houses or lose sleep wondering if they will get to keep their jobs. The sense of entitlement has earned them a special floor in hell (along with most lawyers and the people who worked for Dubya).
This is my first spring in the UK. I left last year in March. I have really enjoyed it, even though the weather is completely unpredictable. I feel sorry for the weather people on the telly. They might as well say, "I can guarantee it will be windy but nothing else."
http://www.youtube.com/user/saveabunny
A small zoo, very well cared for creatures in naturalised settings (lots of plants, large enclosures). It started out as some wealthy person's eccentricity, now is open to the public. Many of the animals are sponsored. Nice day for a drive. The rapeseed is in bloom and smells lovely, though a bit funky. Rough on the eyes, though.
In Europe, after the fall of the Roman Empire and the collapse of the Bronze Age, came the "Dark Ages", (aka the Early Middle Ages)and the establishment of a feudal system. The King, who was supposed to be chosen by God, ruled the people with the idea that they would find a better place in Heaven than here on Earth. Life sucked unless you were rich, but you were grateful and kept your mouth shut. You were supposed to suffer in order to earn your place in Heaven. The Catholic Church had massive influence.