Which observation about the Mid-Atlantic Ridge Region Region provides the best evidence that the seafloor has been spreading for million years?

Which observation about the Mid-Atlantic Ridge Region Region provides the best evidence that the seafloor has been spreading for million years?

Which observation about the Mid-Atlantic Ridge region provides the best evidence that the seafloor has been spreading for millions of years? The bedrock of the ridge and nearby seafloor is igneous rock.

What evidence did they find in the rock around the Mid-Atlantic Ridge that proves that the crust is spreading?

The significance of the magnetic stripes was only revealed when their ages were discovered from dating magnetic reversals in volcanic rocks accessible on land. The dates revealed that the Atlantic Ocean was opening by seafloor spreading from the Mid Atlantic Ridge at a rate of about 0.02 metres per year.

What feature is found in the middle of the Atlantic Ocean and why is it significant in the discovery of plate tectonics?

The Mid-Atlantic Ridge includes a deep rift valley that runs along the axis of the ridge along nearly its entire length. This rift marks the actual boundary between adjacent tectonic plates, where magma from the mantle reaches the seafloor, erupting as lava and producing new crustal material for the plates.

Is the Mid-Atlantic Ridge the result of seafloor spreading?

Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor. The Mid-Atlantic Ridge, for instance, separates the North American plate from the Eurasian plate, and the South American plate from the African plate. The Mid-Atlantic Ridge, for instance, is a slow spreading center.

What do you expect to find at a mid-ocean ridge?

Because mid-ocean ridges are places where tectonic plates are pulling apart, you might expect to find an incredibly deep canyon, but that’s not exactly the case. As the tectonic plates pull apart, molten rock, or magma, comes up from below to fill in the gaps.

Which of the following provides evidence of plate motion?

Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Finding identical or similar fossils in areas separated by vast distances were some of the first clues that scientists used to reconstruct past plate movement.

What is the mid-Atlantic ocean ridge Why is it important?

Mid-ocean ridges are geologically important because they occur along the kind of plate boundary where new ocean floor is created as the plates spread apart. Thus the mid-ocean ridge is also known as a “spreading center” or a “divergent plate boundary.” The plates spread apart at rates of 1 cm to 20 cm per year.

What do you expect to find at mid-ocean ridge?

Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth’s tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.

What is the difference between a slowly spreading and rapidly spreading seafloor?

Seafloor spreading is not consistent at all mid-ocean ridges. Slowly spreading ridges are the sites of tall, narrow underwater cliff s and mountains. Rapidly spreading ridges have a much more gentle slopes. The Mid-Atlantic Ridge, for instance, is a slow spreading center.

How did scientists first identify the process of seafloor spreading?

The magnetism of mid-ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century. Basalt, the once- molten rock that makes up most new oceanic crust, is a fairly magnetic substance, and scientists began using magnetometer s to measure the magnetism of the ocean floor in the 1950s.

What two tectonic plates does the Mid-Atlantic Ridge separate?

The Mid-Atlantic Ridge, for instance, separates the North American plate from the Eurasian plate, and the South American plate from the African plate.

How does the southeast Indian Ridge differ from other mid-ocean ridges?

The Southeast Indian Ridge marks where the southern Indo-Australian plate forms a divergent boundary with the Antarctic plate. Seafloor spreading is not consistent at all mid-ocean ridges. Slowly spreading ridges are the sites of tall, narrow underwater cliff s and mountains. Rapidly spreading ridges have a much more gentle slopes.