Big mountains hide under the sea. 

43 words
🖼️ Images & Media (8)
Mid-ocean ridge cut away view.png
World Distribution of Mid-Oceanic Ridges.gif
(Manuscript painting of Heezen-Tharp...
Mid-ocean ridge topography.gif
Þingvellir National Park, Bláskógabyggð...
Earth seafloor crust age 1996 - 2.png
Oceanic spreading.svg
MgCaRatioChanges.jpg
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Content adapted from Wikipedia
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Readability: FK 12.5
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Vital Level 4