Running along the top of this chain of mountains is a deep crack, called a rift valley. It is here that new ocean floor is continuously created. As the two sides of the mountain move away from ...

A new wave of seismic science is emerging from the ocean floor—and it could ... have mapped the geology of the Mona Rift, a deep underwater fault zone northwest of Puerto Rico, revealing hidden ...

This expedition was the first use of closely spaced echo sounders to map deep sea topography and the first to reveal the extent of the sea floor's rugged ... called the Mid-Ocean Ridge.