The geology of the Alps 

Thank you for your comment. Really glad to hear it has made the subject clearer to understand. Much appreciated. Jim

So pleased to know you like it :)

It is really lovely to know you have enjoyed and learnt a lot fro this video. Thank you 😊

Thanks for your lovely comment. Hope the book has arrived safely :)

Thanks for your comments. Glad you enjoyed it

@@NaturesWorkUK_My pleasure._ I was very into the sciences of nature when young. Alas, the demands of social justice got me pivoted to information and technology! stay well

That's the incredible story of mountain building

​@@NaturesWorkUK It's an ophiolite.

Thrust faults & reverse faults. Specifically, when a new subduction zone forms off of a continental margin, the sea floor in the forearc between the trench and the continent can start to spread as the new subduction zone rolls backwards, forming what is called a “forearc ophiolite” or “suprasubduction zone ophiolite” (an “ophiolite” is just a name for a specific sequence of oceanic mafic and ultra mafic volcanic rocks and ocean floor sediments that is found thrust upon continental lithosphere). Eventually, this subduction zone may become caught up in a continent-continent or arc-continent collision, and the continent or arc that collides will be thrust underneath this forearc/SSZ ophiolite, as the oceanic crust connected to the colliding arc or continent attempts to pulls that arc or continent’s lithosphere down into the subduction zone-where it gets stuck, because it is not dense enough to subduct. So in this situation, you then have this relict slab of oceanic lithosphere on the upper plate, and part of the downgoing colliding arc or continent below it on the lower plate, and when subduction ceases and the subducting oceanic crust that was driving that subduction zone finally tears off due to its overwhelming density relative to the less dense arc or continent attached to it higher up in the subduction channel, collision ends, and you have an ophiolite-a stranded piece of oceanic lithosphere within and above continental lithosphere. And that is just one way to form an ophiolite…

There are always details to fill in, but geology has figured out how the Alps were formed.

@@acr08807 I am never going to be able to take this lot seriously while there telling me two crusty rock surfaces crash into one another, forcing the 'ground' upwards to form gravity defying angles and gradients thousands of feet high. They even had the audacity to say that while its forming the Alps inch by inch, most of the material is actually being driven downward, not upward! Really? What?!

This is how we understand the formation of mountain chains. If geologists come up with alternative theories then that will help. Develop our understanding of plate tectonics