2020年11月10日 · The mid-ocean ridge is a continuous range of undersea volcanic mountains that encircles the globe almost entirely underwater. It is a central feature of seafloor terrain that is more varied and more spectacular than almost anything found on dry land, and includes a collection of volcanic ridges, rifts, fault zones, and other geologic features. At nearly 60,000 …

As the oceanic plates move apart at mid-ocean ridges, rocks from Earth's mantle, far below, rise to fill the void, mostly via slow plastic flow.

1998年3月1日 · The RIDGE Program (Ridge InterDisciplinary Global Experiments-described below) embodies and promotes the spirit of this new cross-disciplinary approach to mid-ocean ridge investigations.

The mid-ocean ridge is a continuous chain of volcanoes on the ocean floor where lava erupts and the crust of the Earth is created. Nearly every day, somewhere on the crest of the mid-ocean ridge, there is likely to be an eruption of lava or an intrusion of magma that builds the ocean crust. Enter this section of Dive and Discover to learn more about Mid-Ocean Ridges.

2019年11月7日 · Ocean trenches are steep depressions in the deepest parts of the ocean [where old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land.

2016年4月12日 · At mid-ocean ridges, plates are spreading apart and magma rises to fill the gaps. Near subduction zones, plates collide, forcing ocean crust down toward Earth’s hot interior, where this crustal material melts, forming magma that rises buoyantly back to the surface and erupts to create volcanoes and seamounts.

1998年12月1日 · The great volcanic mid-ocean ridge system stretches continuously around the globe for 60,000 kilometers, nearly all of it hidden beneath the world's oceans.

Slow spreading ridges like the Mid-Atlantic Ridge generally have large, wide rift valleys and very rugged terrain at the ridge crest.

1998年3月1日 · These data also enable the design of future detailed geophysical and geochemical Mid-Atlantic Ridge studies at the same scale used to understand subaerial volcanic eruptions. The Mid-Atlantic Ridge is composed of discrete spreading segments that are tens of kilometers long, and offset by transform faults and nontransform offsets.

Faster spreading ridges like the northern and southern East Pacific Rise are “hotter,” meaning more magma is present beneath the ridge axis and more volcanic eruptions occur.