The thing which is a flat topped under water volcano is guyot.
What is volcano?
A volcano, such as Earth, is a fissure in the crust of a planetary object that allows lava, ash, cinder as well as gases to erupt out as a magma from beneath the surface.
- In marine geology guyot, is also known as a table mount, it is a kind of volcanic mountain present in underwater in isolated form.
- Oceanic trenches are long and narrow depressions on the bottom of the ocean floor.
- Abyssal plain is a kind of flat section of the ocean floor.
- A seamount is a big geological feature which is arise from the ocean floor but never reaches the water's surface.
Hence, guyot is a flat topped under water volcano.
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