A continent formed entirely by volcanism, possible or not?

Could a continent roughly the size of Europe, Africa and North-America combined be formed almost entirely due to volcanic action?

From a chain of volcanoes the size of Yellowstone maybe? Sprouting over a platformy/plate thingy (can't remember how it's called right now) already in existence.

the volcanoes do not need to be active. Actually they need to be old enough to not be active.

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A continent formed entirely by volcanism, possible or not?

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