GEOLOGY

Detailed explanation-1: -Like dry land, the ocean floor has various features including flat plains, sharp mountains, and rugged canyons (Fig. 7.1). However, the lowest point in the world ocean is much deeper than the highest point on land.

Detailed explanation-2: -The sonar showed that the ocean floor has dramatic physical features, including huge mountains, deep canyons, steep cliffs, and wide plains. The ocean’s crust is a thin layer of volcanic rock called basalt. The ocean floor is divided into several different areas.

Detailed explanation-3: -The ocean floor contains all of the geographic features that can be found on the continents. Mountains, volcanoes, plains, valleys, and canyons. Also, these underwater landforms are many times taller, deeper, longer, and wider than those on dry land.

Detailed explanation-4: -Now we know that the deep oceans have features such as mountains, deep valleys, and vast plains. Many of these are formed by the movement of the tectonic plates that make up Earth’s crust. Far below the ocean’s surface, volcanic mountain chains are rising in mid-ocean zones where plates pull apart.