Match the deep-ocean feature with the correct definition. abyssal plain guyot deep-ocean basin continental volcanic arc seamounts ocean plateau deep-ocean trench volcanic island arc a. extensive region of the ocean floor with thick accumulation of pillow basalts and other mafic rocks b. submerged, flat-topped seamount c. very level area of the deep-ocean floor typically lying at the foot of the continental rise d. portion of the seafloor between the continental margin and oceanic ridge; comprises 30 percent of earth's surface e. submarine volcanoes f. subduction of oceanic lithosphere beneath oceanic lithosphere g. subduction of oceanic lithosphere beneath a continent h. long, narrow troughs located along subduction zones