Crust formation

Crust formation
  • Credit:

    Robert Simmon, NASA GSFC

New crust is formed along the mid-ocean ridges. Plumes of upwelling magma push the plates apart along these ridges at a rate of 1 - 5 cm per year. Underwater volcanoes--black smokers--are a common feature of the ridges.

Images & Animations


File Dimensions

  • 350x179
  • JPEG 12 KB

Note: Often times, due to the size, browsers have a difficult time opening and displaying images. If you experiece an error when clicking on an image link, please try directly downloading the image (using a right click, save as method) to view it locally.


NASA - National Aeronautics and Space Administration