Re: Questions for Extending Earth Believer

Ozan Türkyılmaz <ozan.turkyilmaz@xxxxxxxxx> wrote:

Hi all,

as a geology student i have some questions for Extending Earth
Believers.

1) how do you explain Wadati-Benioff zone?
Lithosphere subducted by mantle extrusion.

2) how do you explain Continental and Volcanic Arcs?
Mantle extrusion reaching the surface

3) how do you explain Continental Colisions like Himalayas and Alps.

No continental collisions, those are overthrust resulting from mantle
upwelling at a shallow angle.

See how the adriatic lithospheric mantle is riding over the european
lithospheric mantle:

http://nachon.free.fr/overthrust/West_Crust.gif

4) how do you explain Anatolia's tectonics? (i live in ?stanbul, i
have to ask this question)

You have to look at the GPS velocities

http://nachon.free.fr/overthrust/GPSaegan.png

Note that Africa and Europa are immobile relatively to each over (no
collision there).
The surface movement are linked to decollement and overthrusting of
different pieces of lithosphere. The origin of the motion is, you guess
it, related to mantle upwelling (a mantle plume if you prefer that term)
pushing away the lithosphere.

This is reminiscent to what happens in the scotia and carribean region:

http://nachon.free.fr/overthrust/scotia.png
http://nachon.free.fr/overthrust/caribbean.png

An elongated area in translation, with a volcanic arc and an orogenic
arc at the tip.

--
Florian
"Toute vérité passe par trois phases. D'abord, elle est ridiculisée;
ensuite, elle rencontre une vive opposition avant d'être acceptée comme
une totale évidence" - Arthur Schopenhauer

.

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