The seafloor

Afbeeldingsresultaat voor

The seafloor goes down four hundred miles after it goes into the trenches. On the way down, some of it melts, loses density, and-white-hot and turbulent-rises toward the surface of the earth, where it emerges as volcanoes, or stops below as stocks and batholiths, laccoliths and sills. Most of the volcanoes of the world are lined up behind the ocean trenches. Almost all earthquakes are movements of the boundaries of plates -shallow earthquakes at the trailing edges, where the plates are separating and new material is coming in, shallow earthquakes along the sides, where one plate is ruggedly sliding past another (the San Andreas Fault), and earthquakes of any depth down to four hundred miles below and flexplek huren rotterdam beyond the trenches where plates are consumed (Japan, i923; Chile, i960; Alaska, i964; Mexico, i985). A seismologist discovered that deep earthquakes under a trench had occurred on a plane that was inclined forty-five degrees into the earth. As ocean floors reach trenches and move on down into the depths to be consumed, the average angle is something like that. Take a knife and cut into an orange at forty-five degrees. To cut straight down would be to produce a straight incision in the orange. If the blade is tilted forty-five degrees, the incision becomes an arc on the surface of the orange. If the knife blade melts inside, little volcanoes will come up through the pores of the skin, and together they will form arcs, island arcs-Japan, New Zealand, the Philippines, the New Hebrides, the flexplek huren amsterdam Lesser Antilles, the Kurils, the Aleutians. Where a trench happens to run along the edge of a continent and subducting seafloor dives under the land, the marginal terrain will rise. The two plates, pressing, will create mountains, and volcanoes will appear as well. The Peru-Chile Trench is right up against the west coast of South America.

24 gedachten over “The seafloor

  1. 855295 739725When I originally commented I clicked the -Notify me when new surveys are added- checkbox and from now on whenever a comment is added I purchase four emails sticking with exactly the same comment. Possibly there is by any means you may get rid of me from that service? Thanks! 787907

  2. 964086 264506Some actually good and utilitarian information on this internet internet site , also I believe the style and style holds great features. 59853

  3. I’m really inspired along with your writing abilities as neatly as with the format in your weblog. Is this a paid subject matter or did you customize it yourself? Either way stay up the excellent quality writing, it is uncommon to peer a nice blog like this one nowadays..

  4. I cling on to listening to the rumor speak about receiving free online grant applications so I have been looking around for the most excellent site to get one. Could you tell me please, where could i get some?

  5. F*ckin¦ amazing things here. I am very satisfied to peer your article. Thanks so much and i’m taking a look forward to touch you. Will you kindly drop me a mail?

  6. I am extremely impressed with your writing skills and also with the layout on your weblog. Is this a paid theme or did you customize it yourself? Anyway keep up the nice quality writing, it’s rare to see a nice blog like this one nowadays..

  7. magnificent post, very informative. I wonder why the other specialists of this sector do not notice this. You must continue your writing. I am sure, you’ve a huge readers’ base already!

  8. The next time I read a blog, I hope that it doesnt disappoint me as much as this one. I mean, I know it was my choice to read, but I actually thought youd have something interesting to say. All I hear is a bunch of whining about something that you could fix if you werent too busy looking for attention.

  9. I’ve read a few good stuff here. Definitely value bookmarking for revisiting. I surprise how a lot effort you put to create this type of great informative web site.

  10. Pretty nice post. I just stumbled upon your blog and wished to say that I have truly enjoyed surfing around your blog posts. After all I’ll be subscribing to your feed and I hope you write again very soon!

  11. Thank you for sharing excellent informations. Your site is so cool. I am impressed by the details that you¦ve on this blog. It reveals how nicely you understand this subject. Bookmarked this website page, will come back for more articles. You, my friend, ROCK! I found just the information I already searched everywhere and simply couldn’t come across. What a perfect site.

  12. Superb blog you have here but I was curious if you knew of any user discussion forums that cover the same topics discussed here? I’d really like to be a part of group where I can get advice from other experienced individuals that share the same interest. If you have any suggestions, please let me know. Kudos!

  13. 15392 291371Right after I initially commented I clicked the -Notify me when new feedback are added- checkbox and now each time a remark is added I get four emails with exactly the same comment. Is there any method you will be able to take away me from that service? Thanks! 654634

  14. I don’t even know how I stopped up here, but I believed this publish was once great. I do not recognize who you’re however definitely you’re going to a well-known blogger for those who are not already 😉 Cheers!

Geef een reactie

Het e-mailadres wordt niet gepubliceerd.