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Date Posted: Friday, February 11, 01:09:52am
Author: Lij
Author Host/IP: kntpin04-nas-01-s249.cinergycom.net / 216.135.24.249
Subject: Most mountains were glaciated up there...
In reply to:
AurraSing
's message, "A geological question for Lij." on Thursday, February 10, 05:38:26pm
Vancouver Island and the Olympic Peninsula are likely different "terrains" but they are on the same tectonic plate - North America. See:
http://studentatlasoforegon.pdx.edu/PDFs/Map18.pdf
You still have those three volcanos on the mainland north-northwest of Vancouver that are due to the subduction west of Vancouver Island. IT's called the Garibaldi Belt:
http://vulcan.wr.usgs.gov/Volcanoes/Canada/framework.html
http://vulcan.wr.usgs.gov/Volcanoes/Canada/description_canadian_volcanics.html
http://vulcan.wr.usgs.gov/Volcanoes/Canada/Maps/map_canada_volcanoes.html
North of that the Queen Charlotte transform fault takes over and no subduction is going on.
Terrains are often a mish-mash of rocks in some very complex structures. They are often island arcs (like the Aleutian Islands) and their back basin (the area between the island arc and the main continent) which gets agglomerated onto a continent (as tectonic mini-plates) as they are carried towards the continent and a suductionzone. British Columbia in that area west of the Rocky Mountains is mostly a series of different terrains that have been attached to the continent. One reason the main part of BC doesn't have any oil or gas prospects.
Vancouver Island is mostly one such terrain (I think). There is at least one gold mine on the island which was emplaced by sea floor black smokers (like they now find with life around them at the sea floor bottom).
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Very different terrains. -- AS, Friday, February 11, 10:38:03am (NoHost/66.183.71.86)
We could see Mt. Rainier and Mt. Baker from one of the spots we stopped at during our park walks....yet another thing we don't have on Vancouver Island. Good thing too since I never promised Ali we would not have any earthquakes but I was able to say it's unlikely a volcano would erupt beneath us!
Thanks!
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Just a note...... -- Lij, Saturday, February 12, 05:44:07am (kntpin04-nas-01-s141.cinergycom.net/216.135.24.141)
By terrain, I am geologically speaking about what would be an assemblage of rock types or sequence of rock types (types being indicative or origin, bedded volcanics, carbonates from a sea or turbidites from sea fans, for instance).
It is unlikely that a volcano might erupt under you, but not impossible. You are sitting on a subduction zone just like the one that caused the Indian Ocean tsunami and fuels the Indonesian volcanos (including Anak Krakatoa which is starting to emulate it's three mothers [Krakatoa was an amalgam of three different volcanic cones when it blew up]). But the Farallon plate under you is - if I remember right diving at a much lower angle under North America than the plate diving under Indonesia. Thus the volcanos are further on the mainland like Baker and Garibaldi. But you never know!!
And yes, because of the subduction of the Farallon plate beneath you, you have a good chance of earthquakes. I think Seattle has a greater chance, but I am not sure why....
That's it...
Except that I am connected at 143 Kbps right now but only uing about 33% of that to stay under the limit that a dial-up modem is supposed to use. BUT!!!! I have been on the Internet now for about 11 hours and while I got booted off the Net twice, the computer has NOT ONCE FROZEN UP!!!!!!
YAaaAAAaasY!!!!!!!!!!!!!
Now watch it will freeze up before I can press the SEND button below.... here I go.....
;-)
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Dial-up. -- AS, Saturday, February 12, 10:52:20am (S0106687f7434f2ef.no.shawcable.net/70.66.67.39)
That brings back some memories.....and you are crashing less now? I can see that trying to get those huge updates would be hard on your bandwidth issues, we are almost 4G here by now as far as cell coverage and at home it's pretty damn fast as well. Technical challenges ,eh?
We do have earthquake drills here...no volcano drills BUT if Baker or Rainier does blow, we'll have issues with ash,etc depending on the winds. For a prairie girl , it's still a little awe-inspiring , if you know what I mean.
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I'm 2 miles from the switch in the village..... -- Lij, Saturday, February 12, 03:40:11pm (kntpin04-nas-01-s141.cinergycom.net/216.135.24.141)
Which puts me on the lower end of getting a DSL line. But since this modem had a line speed up to 143 Kbps maybe we can get some good DSL speeads (143Kb was higher than what it was set for -- 115Kb, I think).
We have 4G here too. But my phone is antiquated and basically only good for... a phone! I sorta like it like that.
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Heh-heh. -- AS, Saturday, February 12, 06:04:11pm (NoHost/66.183.71.86)
I rarely use my phone as a phone. I get more wrong numbers than I do calls! But the kids and I can send emails about things we need to do/pick up and I can text Don during the work day...his job is in a different calling areas and this way we avoid long distance charges. I do a lot of web browsing though so my plan is centered more around data than anything else, a flat fee gets me 50 MB a month in data and unlimited text,video and picture messages. Plus it takes a fairly decent photo, so I don't need to worry anymore about bringing my camera along if there is a chance I need to grab a shot or two...
https://picasaweb.google.com/AurrasPlace/PodPictures102?authkey=Gv1sRgCNvjh6H0mv6Bbg#
Rumour has it that Apple is thinking of developing a mini-iPhone. Not that it's a big thing to carry around but it if drops the price and has no contract, I'll get one for Ali.
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