stock here: this is a good plate movement reference, I like it because it is so old.
I was a graduate student at her Fairbanks University of Alaska back in 1965-7 studying the basalts in the central Alaska region. On area of my studies found a mixture of basalts, prettified wood, deep sea shells, all mixed together. When I wrote my thesis I stated that this could be a area of collision between an island arc and the Brooks Range. The department professors found my ideas as crazy. I was not allowed to put my speculation in my thesis. Now we know that Alaska is made up of a number of land units that have collided against the Brooks range to make much of the land mass of Alaska. At the time plate tectonics was not believed by many of the professors and the definitive proof was a few years later provided that revolutionized the field of geology. This video summarizes our knowledge as of the period around 1970. It is an old video but still quite accurate. We now have an even more detailed understanding of plate tectonics. Much of the information provided here was collected to support the “Cold War”. The knowledge of the earth’s surface was critical at the time.Show less
2 replies on “Plate Tectonics”
I liked the part about Iceland and Tonga which are so active these days.
I didn’t know they had so much newer info in recent decades.
It was cool, as amazingly, this was a new theory that was at the point of general acceptance of academia. A great study would be to see who introduced this 50 years earlier and was outcast, LOL
Some day soon they will accept space weather and CMEs as activators of EQ and vulcanism. Shame on “Science”