Talk:Mid-Atlantic Ridge

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There is an inconsistancy betweeb this page and the one on mid-ocean ridges - that page says the movement is 10mm per year (each side?) and this page says the Atlantic is growing by 50-60mm year. Any one know the right figure?

Kert01 10:36, 18 August 2006 (UTC)

Reply on Talk:Mid-ocean ridge - Vsmith 11:40, 18 August 2006 (UTC)

Info missing[edit]

I would have been interessted in the depth (or average depth) of the ridge. —Preceding unsigned comment added by (talk) 11:12, 22 September 2006

Other than on Iceland. (SEWilco 02:25, 23 September 2006 (UTC))
Found mention that "The ridge has a height of 2,500 meters below sea level, whereas its flank is about 5,000 meters deeper." (SEWilco 19:55, 20 November 2006 (UTC))

Date of opening of Mid-atlantic[edit]

I tried to find out the date at which North America, and South America, started to drift away from Europe/Africa, but conld not find it anywhere. I suggest that it is included in this entry. (I think that it is 110 MYA (million years ago). 23:24, 28 April 2007 (UTC) Steve Kirkby

At least one information: When the French-American Mid-Ocean Undersea Study took place in 1973/74 they found out that at one special point "crust on either side of the valley should be about 1 million years old". (Jean Francheteau u. a.: Transform Fault and Rift Valley from Bathyscaph and Diving Saucer, Science, New Series, Vol. 190, No. 4210 (Oct. 10, 1975), p.108) ---- (talk) 15:15, 10 February 2012 (UTC)


the mid atlantic ridge is made out of basalt yh man —Preceding unsigned comment added by (talk) 18:38, 2 October 2008 (UTC)


I don't really see the purpose of giving a single point location for a ca. 20,000 km long structure. Mikenorton (talk) 08:54, 9 September 2009 (UTC)

Agree - pointless, removed. Vsmith (talk) 12:58, 9 September 2009 (UTC)

Info missing (2)[edit]

From the earlier comment, it seems that there used to be a figure for how annual expansion much the ridge is causing, but it seems to have gone. Could somebody in the know insert the correct figures? I understand the figure is not constant along the length of the ridge, but it's why I came to this article. Regards Davidelit (Talk) 17:05, 13 March 2011 (UTC)

I've added an average rate for the ridge. Mikenorton (talk) 18:34, 13 March 2011 (UTC)

Elevation of the MAR[edit]

A recent edit added a value of 4000 m for the flank of the ridge, which I reverted as the source was actually referring to the Cayman Trough. However the values currently in the article are a bit meaningless - parts of the ridge are well below 3000 m and part of it (Iceland) is above sea level. I'm minded just to remove it altogether, as I can't yet find a source that gives that sort of information. Mikenorton (talk) 22:03, 1 February 2015 (UTC)

As those numbers reappeared, I've removed the sentence completely. That source contains little of value for this page. Mikenorton (talk) 18:55, 22 April 2015 (UTC)