Sonar Image Of Ocean Floor Showing Mid-ocean Ridge
by Dr Ken Macdonald/science Photo Library
Title
Sonar Image Of Ocean Floor Showing Mid-ocean Ridge
Artist
Dr Ken Macdonald/science Photo Library
Medium
Photograph - Photograph
Description
Mid-ocean ridge. Image of the floor of the Pacific Ocean showing an overlapping spreading centre on the East Pacific Rise. The colours show the depth of the ocean floor, from dark blue (deepest) through light blue, green and yellow to red (shallowest). The overlap is at the centre of the frame. Overlapping parts of spreading ridges initially show high volcanic activity which soon decreases due to a fall in magma supply. As a result, changed local spreading patterns cause the ends of the overlaps to curve inward. The overlap may eventually disappear, resulting in a main ridge with a smaller, parallel ridge. The image was made using sonar and echo-sounding data.
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September 23rd, 2018
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