I had heard some time ago that old mountains (and in mountain years, that’s a lot of years, centuries, millennia and aeons) are lower in elevation, eroded and rounded while new mountains tend to be taller with sharp and jagged peaks.
I live along the eastern seaboard of the U.S. and within the 480-million-ish year-old Appalachian Mountains, which, if you’ve ever seen them, are definitely an older, rounded and rolling mountain range, compared with, for example, the rather young (about 50 million years old) tall, jagged and spiky Himalayan Mountains.
These bits and factoids above, I had some awareness of.
But this graphic showing these other mountain ranges in Morocco, Greenland, the Scottish Highland and these bits of Europe … well, that just blew my mind. They all formed at the same time on the, as it’s called, super-continent Pangea.
I can’t explain all the details of how it works, but holy smokes! Those are some OLD mountains!