Volcanoes and Hot Spots

[planmet]

If these flood basalts were so extensive, where does all the extra mass come from each time these events happen? A hot water boiler has convective currents acting within it but the water does not keep increasing in volume. Convective currents are decompressional and would never create such incredible pressures - enough to buckle mountains.

[2011rhythmdivine]

Volcanoes are just as silent as they are lethal. This material educates us about the good and evil of volcanoes. Quite splendidly presented. Thanks.

[TheOceangal]

I really found this useful. I am only just starting out in Marine Biology (from the very beginning) at 34 and it was good to have this lecture which didn't over complicate the processes. Thank you :O)

[shusha123]

This was very helpful for my project!

[hreader]

A well-presented lecture brilliantly illustrated (not sure why some of the audience seemed to be taking 40 winks). I saw a lava lake complete with mini 'plates' as described by the Prof (I called them 'crazy paving' as that's what it looked like) aged 10 at Surtsey, Iceland, 20th August 1964. The lake threw up periodic fountains on one side about 50-100ft high.