This is expensive and time consuming so sonar maps are mostly only made of places where ships spend the most time.
Map of the atlantic ocean floor.
It separates the old world from the new world the atlantic ocean occupies an elongated s shaped basin extending longitudinally between europe and africa to the east.
Typically finely wrought ocean maps have been the result of extensive sonar.
The following features are shown at example depths to scale though each feature has a considerable range at which it may occur.
It covers approximately 20 percent of earth s surface and about 29 percent of its water surface area.
This graphic shows several ocean floor features on a scale from 0 35 000 feet below sea level.
It shows such locations as the mid atlantic ridge mid ocean canyon the biscay abyssal plain and the rio grande rise this is the unused huge.
The atlantic ocean is the second largest of the world s oceans with an area of about 106 460 000 km 2 41 100 000 sq mi.
National geographic map side b.
Here is a map of the atlantic ocean floor shown in great detail using shaded relief.
The outstanding feature of the atlantic floor is the mid atlantic ridge an immense median mountain range extending throughout the length of the atlantic claiming the centre third of the ocean bed and reaching roughly 1 000 miles 1 600 km in breadth.
This distinctive physical map of the atlantic ocean floor appeared on national geographic as a supplement to the map of the atlantic.
Continental shelf 300 feet continental slope 300 10 000 feet abyssal plain 10 000 feet abyssal hill 3 000 feet up from the abyssal plain seamount 6 000 feet.