Abyssal hills

Abyssal hills are irregular structures on the oeean floor that average about 825 ft (250 m) in height. They often occur over very wide stretches of the oeean floor and are especially common in the Pacific Ocean. Abyssal hills are probably just smaller versions of the voleanie features known as seamounts. 

Porosity versus mean grain size from continental terrace, abyssal hill, abyssal plain, and diatomaceous samples from the Bering and Okhotsk Seas. (Reproduced with permission from Hamilton, E.L., and Bachman, R.T., /. Acoust. Soc. Am., 72,1939-1957,1982. Copyright 1982 Acoustic Society of America.)... 

North Pacific North Central Clay 0.3. 5 4 X SUva and Jordan Abyssal hill region with... 

The basins of Earth s four oceans, the Atlantic, Pacific, Indian, and Arctic, differ from each other in many respects. Yet, they all contain certain common features that include oceanic ridges, trenches, and fracture zones and cracks, abyssal plains and hills, seamounts and guyots. 

Abyssal Spreading Abyssal Abyssal bills center hills plains... 

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