<p><strong>Fig. 9.20.</strong> Challenger Deep is a location at the bottom of Mariana Trench in the western Pacific ocean basin. It is the deepest point of the world ocean at 10,994 meters.</p>

Fig. 9.20. Challenger Deep is a location at the bottom of Mariana Trench in the western Pacific ocean basin. It is the deepest point of the world ocean at 10,994 meters.

Image courtesy of Kmusser, Wikimedia Commons