Re: Age/magnetism of ridges at Mid Atlantc ridge

I understand that the mid-Atlantic ridge is a very extensive and quite 
active feature on the Atlantic Ocean sea floor.   Since it is not within 
the specialty of this scientist, some internet research was done.   Many 
sites on the internet contain recent information.   Most of the ridge is 
submerged, and therefore little is known about the ridge and adjacent 
features except from geophysical studies and deep ocean research.   
Information at one site describes the ridge as follows:

"The Mid-Atlantic Ridge marks the divergent boundary that runs through the
middle of the Atlantic Ocean. Here new portions of the earth’s crust are 
being formed and are pushing the continents further apart. The extent of 
the forces operating here is indicated by the amount of fracturing along 
the ridge. Cracks perpendicular to the ridge are transform faults, planes 
along which portions of the plates slide horizontally past each other."

To help you in your quest for information below are some URLs to check out:

Mid-ocean ridge tectonics www.ocean.cf.ac.uk/people/neil/mor/mor.html

CONTINENTAL DRIFT,
PLATE TECTONICS, AND THE BIBLE http://www.icr.org/pubs/imp/imp-032.htm

Discovering Plate Tectonics http://earthview.sdsu.edu/trees/tectonics.html

The Mid-Ocean Ridge en.wikipedia.org/wiki/Mid-ocean_ridge

Mid-Atlantic Ridge http://earth.agu.org/revgeophys/humphr01/node5.html

Deep Ocean Basins: Oceanic Ridges - Mid-Atlantic Ridge  

http://www.coast-nopp.org/visualization_modules/physical_chemical/basin_coastal_morphology/principal_features/deep_ocean/oceanic_ridges/mid_atlantic.html

Multi-scale spectral analysis of bathymetry on the flank of the Mid 
Atlantic Ridge http://adsabs.harvard.edu/abs/1997JGR...10215447G

The internet and texts on the subject available at many librarys should 
help you further in your quest.   I wish you the best!