The continents are silhouetted in black. Ocean depth is indicated from red (shallow) to blue (deep), increasing in depth with distance from the shoreline. Great swathes of the ocean floor are at ...
The advent of sonar allowed for the first in-depth surveys of the deep ocean floor, and these studies drove geologists to finally accept a radical theory proposed decades earlier and dismissed for ...
The ocean has an average depth of approximately 3.7 kilometres (or 2.3 miles). A calculation from satellite measurements in 2010 put the average depth at 3,682 metres (12,080 feet). However, at the ...