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obsidian. It is a very dark substance.
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∙ 11y ago
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When magma rises up through the sea floor rifts and cools to form ocean floor?
yes
What causes material to form at a mid-ocean ridge on the ocean floor?
New material forms on the ocean floor of the mid-ocean ridge due to plate tectonics and volcanic activity. Volcanic eruptions deposit cooled magma on the ocean floor.
What cause new material to form at a mid ocean ridge on the ocean floor?
New material forms on the ocean floor of the mid-ocean ridge due to plate tectonics and volcanic activity. Volcanic eruptions deposit cooled magma on the ocean floor.
Hardens to form new rock at mid-ocean ridges?
Sea- Floor Spreading molten material erupts through the valley that runs along the center of some mid-ocean ridges. This material hardens to form the rock of the ocean floor. Mid-ocean ridges an undersea mountain chain where new ocean floor is produced.
Does a volcano form when magma reaches earths surface?
That is correct. When magma travels from the mantle to the crust and reaches the surface, that is a volcano.
What happens to the magma after being pushed upward and exposed at the surface of the ocean floor?
The lava would form pillow basalts.
What happen to the magma after being pushed upward and exposed at the surface of the ocean floor?
The lava would form pillow basalts.
Location in ocean basin where new ocean floor is formed?
This sounds like the mid ocean ridge. This is where the plates are moving apart and magma wells up to form new rock.
The youngest rocks on the ocean floor are located?
The youngest part of the ocean floor is found at conservative plate boundaries where oceanic crust is pulled apart and magma rises from the mantle to form new oceanic crust.
What is the way 25-cm manganese nodules form on the ocean floor?
it is either apatite, kimberlite magma precipitation minerals calcite or mica
A vent at the earth's surface through which magma and gases erupt?
Magma becomes known as lava when it reaches the surface. And when the lava cools it usually forms some type of igneous rock, depending on the chemical composition of the lava. The gases have no common name that I know of. But for the most part they are common gases which include but are not limited to steam, CO2, and traces of sulfur gases.
What do oceanic ridge systems represent?
At the mid-ocean ridges, new ocean floor is continuously being created from rising magma originating from the Earth's mantle. The creation of the new oceanic crust pushes older crust away from the ridge in a conveyor belt fashion. This process is known as sea-floor spreading. The fracture can be seen beneath the ocean as a line of ridges that form as molten rock reaches the ocean bottom and solidifies. A narrow depressed area running along the center of the ridges, called a rift, is the region where volcanic activity is adding magma to the two diverging pieces of oceanic crust.
