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What is the underlying rock beneath the ocean floors?
Near shore, sedimentary. Deep ocean, extrusive igneous, mainly basalt.
What igneous rock are formed when lava cools at earth's surface?
Basalt is the igneous rock formed when lava cools at the Earth's surface. It is fine-grained and commonly found in ocean basins.
What rock is at the bottom of the ocean?
Mostly basalt but other extrusive igneous rocks as well
What is the most common extrusive rock and where is it found?
The most common extrusive igneous rock is basalt, composing the bulk of the oceanic plates.
What is the most common rock found in Iceland?
Iceland, an exposed area along the mid-ocean ridge would consist largely of the extrusive igneous rock basalt.
What igneous rock that formed from lava that erupted into earths surface are called?
When igneous rock forms on the Earth's surface, including on the ocean floor, it's called extrusive. It's called intrusive rock when it forms beneath Earth's surface, such as in mines.
Is pumice an extrusive or an intrusive rock?
Pumice is Extrusive after it has been envelop from the volcanoes eruption! it can somehow be a intrusive but very "rare". It is however very light and bumpy felling!
What igneous rock found in the ocean crust called?
Basalt.
What are found over the continents and also on the ocean floors?
Volcano's
What happens if an extrusive igneous rock goes in the ocean and wind acts on it?
The extrusive igneous rock will float because that extrusive rock got cooled down fast then a regular extrusive. When the wind acted on it, it get cool down fast and the gases from the volcano gets trap in the rock and the weight of that rock is light. Also water and gases have different density so the gases in the rock will be pushed upward and the rock will float because of the weight and the gases in the rock. (P.s only a prediction)
Which major kind of rock is formed by seafloor spreading?
Seafloor spreading at mid ocean ridges produces magma and later igneous rocks that are mostly basaltic. Being a mafic rock, it ejected from a mid ocean ridge so it is extrusive. Often it is aphanitic and visicular. Basalt is most common on sea floors because the magma that is melted is comprised of mostly mafic rocks.
What is the eroded material found on the ocean floor is called?
Igneous Rock
