Submerged basaltic volcanoes that are higher than 1 km are called

Basaltic volcanoes that are higher than 1 kilometer are called seamounts. Seamounts are mountains rising from the ocean floor. They do not reach the water’s surface or sea level, and they are not islands as well. They are usually found from the sea floor rising for about 1,000-4000 meters or 3,300-13,100 ft. in height. Seamounts rise to at least 1000 meters from the seafloor. Most of them are believed to be made during volcanic processes, typically from extinct volcanoes.  

Asmall closed hole formed in an outwash plain or moraine. forms when a  glacier retreats then remains stationary. 

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