As a geologist who works in the Appalachians… They’re cool af.
Nothing is more surreal than being a geologist. Just today I was standing on a dirt road in the middle of farmers field. Looking at the ground is an innocuous little outcrop of boring looking rocks. But those rocks erupted at the bottom of a back arc basin off the coast of Laurentia, was buried by ocean sediment for ages, had an entire ISLAND of rock thrust onto it, and then buried 10s of kilometers deep. The history one rock can tell is amazing.
uniqueid198x@lemmy.dbzer0.com 1 year ago
Small? The Appalachians today are the resting skeleton of a mountain range so tall and enduring that the mud and sand that washed off them piled miles high and formed the Catskill mountains. The Appalachians were so mighty that their garbage formed mountains
ChicoSuave@lemmy.world 1 year ago
Also they spread so far that they were broken when Pangaea, the first landmass, split apart. The other half is the Scottish Highlands. They are older than the Atlantic Ocean between them.
uniqueid198x@lemmy.dbzer0.com 1 year ago
One nit, pangea wasn’t the first supercontinent, we know of at least two, maybe three before it. The stone of the Adirondak mountains was formed as part of the Grenville mountains, which were built by a suprecontinent 1.5 billion years ago (the adirondaks got tall be’ause of a much more recent, unrelated thing, but their stone is very old). The Grenville runs from Hudson Bay to Texas
JoeBigelow@lemmy.ca 1 year ago
And theoretically the Atlas in Northern Africa
FooBarrington@lemmy.world 1 year ago
Big deal, Americans do the same every day!
Mutelogic@sh.itjust.works 1 year ago
Dammit! I am sleep deprived and grumpy, but you got a good chuckle out of me… Thanks.
uniqueid198x@lemmy.dbzer0.com 1 year ago
Ok yeah this was good
Classy@sh.itjust.works 1 year ago
Isn’t Appalachia part of the Andes too, or are they unrelated?
uniqueid198x@lemmy.dbzer0.com 1 year ago
Completely unrelated. North and south america wern’t attached when the appalachians were tall. The Andes are formed by an ocean plate (the Nazca plate) dragging as it is sucked under south america. They are tall, and still growing taller.
emergencyfood@sh.itjust.works 1 year ago
Unlikely, the Andes are newer.
protist@mander.xyz 1 year ago
No, the Andes are part of the American Cordillera, which also includes the Sierra Nevada and Sierra Madre and has to do with the Pacific Plate/Ring of Fire