Hi All,

Happy New Year.

I have a question about Subduction Zones and their angle of incidence down 
to the mantle.  If I remember correctly, the Mariana Trench is quite steep 
while others are not.

I was wondering specifically about the Pacific and Juan de Fuca plates and 
their subduction angle under the Cascade Mountains.  Specifically, I am 
wondering how far the subduction angel goes inland before it melts into the 
mantle?

The 3.8 event at the Yellowstone Park area brought the question to mind.  I 
know there is supposed to be a Hot Pocket under that area and potentially 
explosive, but I was wondering if the subduction wedge extended inland that 
far.  Truthfully, I don't know how far Yellowstone is from the coast.

Of course, the farther inland, the deeper the wedge would be.  The 
Yellowstone event was shallow (6.8 km), and obviously not what I an asking 
about.  Nevertheless, I was wondering about that specific area anyway. 
Anybody know?

What the heck do you have to think about anyway, New Years parties?

Regards,
Jerry








Hi All,
 
Happy New Year.
 
I have a question about Subduction Zones and their angle of=20
incidence down to the mantle.  If I remember correctly, =
the=20
Mariana Trench is quite steep while others are not.  
 
I was wondering specifically about the Pacific and Juan de Fuca =
plates and=20
their subduction angle under the Cascade Mountains.  Specifically, =
I am=20
wondering how far the subduction angel goes inland before it melts into =
the=20
mantle? 
 
The 3.8 event at the Yellowstone Park area brought the question to=20
mind.  I know there is supposed to be a Hot Pocket under that area =
and=20
potentially explosive, but I was wondering if the subduction wedge =
extended=20
inland that far.  Truthfully, I don't know how far Yellowstone is =
from the=20
coast.  
 
Of course, the farther inland, the deeper the wedge would be.  =
The=20
Yellowstone event was shallow (6.8 km), and obviously not what I an =
asking=20
about.  Nevertheless, I was wondering about that specific area=20
anyway.  Anybody know?
 
What the heck do you have to think about anyway, New Years =
parties?
 
Regards,
Jerry