Subduction Zones and Arcs by Robert Stern

[zxwmabcdef]

If you look at the trans Mexican volcanic belt I think you can see where the slab changes to 70 degrees and the mantle flows. The distance between the mountains changes just west of mexico city. There is also a bow up and down in them.

[MrJuliane]

Dehydration dynamics in subduction zones contribute to the understanding of seismic regimes and I think it's amazing to link that to plate tectonics. Also, as Mr Stern stated, metamorphic petrology can support these investigations, which is great for petrology enthusiastic like me. Great lecture.

[annetteku]

Link to the previous lecture, he talks about in the beginning?

[Noahide]

Been looking at things. Subduction zones are were the 'Land' meets 'The Great Deep'. The Great Deep is the Seabed. The Great Deep covers the whole world. Waters were separated at the beginning which covered the great deep, and land was made by God in various places on top of the Great Deep. Water still covered the Great Deep and now land also was upon the great deep. Subduction zones are were the great deep meet the land. That seabed covers the whole world I would say, a foundation for the seas and the land.

[RichardKCollins]

At 16:40 isn't the lower density surface slab going to float upwards? The deeper it gets the stronger the bending force? Will see if I can answer that myself. In a billion years, at 5 cm/year a slab would reach down to 2800 km many times. Your diagram assumes it breaks.

You talked about collaboration, but now ALL the geophysics and related sensor networks are combining for a variety of reasons. You cannot solve climate change without including all the data from all the countries, and all the disciplines.

You poo-pooed the visualizations, but your artists are pretty good. I wonder what it really looks like.

Nice talk.

Richard Collins, The Internet Foundation

[geoffgeoff]

Good lecture. Poor editing. We don't need to see the talkers face most of the time. Keep it on the slides

[Noahide]

I am a creationist. I would profer that subduction and the rock cycle processes are happening far more quickly than the millions of years hypothesis.